# agni (अग्नि)

> Canonical version of this page: https://nighantu.ageayurveda.com/lexicon/agni/

An Ayurvedic technical term, rendered into English in 9 different ways.
The renderings do not agree, and the difference between them changes what the term is taken
to mean.

## Identification

| Field | Value |
| --- | --- |
| Transliteration | agni |
| Devanagari | अग्नि |
| Also written | deha-agni, dehāgni, antarāgni, koṣṭhāgni, pācakāgni, kāyāgni, vahni, ūṣman, pācaka pitta |
| Category, as gathered | physiology / core concept |
| Grouped under | Body: tissues, wastes and channels |
| Classical citations | 6 |
| Citations checked | 2026-10-08 |

## How it is translated, and whether the translation holds

Each rendering is given with the source that uses it. The assessment is ours.

### Digestive, metabolic factors

WHO International Standard Terminologies on Ayurveda (2022) · ITA-2.6.1 · terminology-standard

WHO deliberately avoids 'fire'. Full WHO description, verbatim: 'The collective term for the various factors governing digestion and metabolism or food transformation which are basic element fire -predominant.' Retrieved and re-verified against the live IRIS PDF.

Reproduced unaltered and attributed from the WHO International Standard Terminologies on Ayurveda, which is what that
licence permits, and deliberately absent from the downloadable dataset, which is CC BY 4.0.

### Metabolic factors of the body

WHO International Standard Terminologies on Ayurveda (2022) · ITA-2.6.2 (kāyāgniḥ) · terminology-standard

WHO treats kāyāgni as a separate headword from agni, which most textbooks do not.

Reproduced unaltered and attributed from the WHO International Standard Terminologies on Ayurveda, which is what that
licence permits, and deliberately absent from the downloadable dataset, which is CC BY 4.0.

### digestive fire

Charaka Samhita, tr. Avinash Chandra Kaviratna (1896-1913) · passim; e.g. Sūtrasthāna Lesson V, Chikitsāsthāna Lesson XV · public-domain-translation

Kaviratna's default rendering throughout. He also uses bare 'fire' and 'heat' for the same word, and 'heats' in the plural for the bhūtāgni/dhātvagni sets.

### internal fire

Sushruta Samhita, tr. Kaviraj Kunja Lal Bhishagratna (1907-1916) · Sūtrasthāna Chapter XXI, p. 196 · public-domain-translation

Bhishagratna's rendering of antarāgni, applied to pitta: 'Pittam therefore is called internal fire.'

### digestive fire or heat (Pachakagni)

Sushruta Samhita, tr. Kaviraj Kunja Lal Bhishagratna (1907-1916) · Sūtrasthāna Chapter XXI, p. 197 · public-domain-translation

Bhishagratna glosses pācakāgni this way; note he equates it with pitta, following Sushruta's own doctrine.

### Agni includes bile and pancreatic secretions, and hence indicates the state of one's digestion. Appetite, though not an unerring indicator of the process, is the effect of Agni.

Sushruta Samhita, tr. Kaviraj Kunja Lal Bhishagratna (1907-1916) · Sūtrasthāna Chapter XXXV, translator's footnote, p. 320 · public-domain-translation

An explicit 1907-16 attempt at biomedical equivalence, and an explicit warning by the translator that agni is not appetite.

### derangement of digestive power (agnivaiṣamyam)

NAMASTE / National AYUSH Morbidity Codes (NAMC), Ministry of Ayush · NAMC code D (agnivaiShamyam / अग्निवैषम्यम्) · terminology-standard

NAMASTE has no standalone code for agni itself; it is a morbidity list, so agni enters only as the top-level disorder heading 'derangement of digestive power'.

Reproduced unaltered and attributed from the Government of India NAMASTE terminology, which is what that
licence permits, and deliberately absent from the downloadable dataset, which is CC BY 4.0.

### no ICD-11 entry found for agni as such

ICD-11 MMS v2026-01, Traditional Medicine Module 2 (TM2) · searched TM2 block index and gastro-intestinal, whole-body and bone/joint sub-blocks · classification · our paraphrase of the source, not its words

TM2 is a morbidity classification; agni appears only inside index terms of disorder categories (see agnimandya). Absence here is a statement about what I retrieved, not a proof of exhaustive absence.

### biological fire / metabolic fire / digestive fire

Modern Ayurvedic textbook and review usage · e.g. PMID 22131747; PMID 26283805 renders jāṭharāgni as 'metabolic fire' · secondary-literature · our paraphrase of the source, not its words

The commonest English forms in the peer-reviewed Ayurvedic literature; note they conflict with WHO's deliberately non-metaphorical 'digestive, metabolic factors'.

## The classical passages

### Charaka Saṃhitā Cikitsāsthāna 15 (Grahaṇīdoṣa Cikitsā):3-4, checked against the source

> The period of life, complexion, strength, health, exertion, growth, lustre, ojas, energy, animal and other kinds of heat, and the life-breaths, have all been said to have the digestive fire for their cause. When this fire becomes extinguished, a person dies. When it burns within the body, one lives long without ailments of any kind. When it becomes vitiated, one becomes afflicted with disease. For these reasons, this fire is said to be the root (of all).

tr. Avinash Chandra Kaviratna · https://archive.org/stream/BIUSante_47357/BIUSante_47357_djvu.txt

Agni is the cause of lifespan, complexion, strength, health, exertion, growth, lustre, ojas, tejas and the pranas, all of which Ci.15.3 calls dehagni-hetukah; and Ci.15.4 concludes mulam agnis tasman nirucyate, agni is therefore called the root. Kaviratna prints these as his aphorisms 2 and 3, which is one behind the standard here. HIS OFFSET IN THIS CHAPTER IS NOT CONSTANT and must never be applied by arithmetic: he is level by his 120-121 and runs one ahead from his 195.

### Charaka Saṃhitā (Sanskrit) Cikitsāsthāna 15:4, checked against the source

> शान्तेऽग्नौ म्रियते, युक्ते चिरं जीवत्यनामयः। रोगी स्याद्विकृते, मूलमग्निस्तस्मान्निरुच्यते॥४॥

tr. none (Sanskrit mūla) · https://www.siva.sh/caraka-samhita/chikitsa-sthana/15/4

Sanskrit wording and standard verse number for the 'agni is the root' statement, used to fix Kaviratna's off-by-one numbering.

### Charaka Saṃhitā Sūtrasthāna 12 (Vātakalākalīya):11, checked against the source

> The son of Marichi said,—The heat dwelling in the body, within the Bile, when excited, produces evil and when in its normal condition leads to beneficial consequences. This is as follows :—In its normal condition it aids digestion, vision, the proper measure of warmth (of body), propriety of complexion, courage, cheerfulness, and free play of the faculties, &c. When excited, it produces indigestion, weakness of vision, an improper measure of warmth, an unhealthy complexion, fear, wrath,

tr. Avinash Chandra Kaviratna · https://archive.org/stream/BIUSante_47357/BIUSante_47357_djvu.txt

Charaka's position on the agni-pitta relation: agni is 'within' pitta (pittāntargata), not simply identical with it. Kaviratna renders agni here as 'the heat dwelling in the body' rather than 'digestive fire'.

### Charaka Saṃhitā with Cakrapāṇi's Āyurvedadīpikā (Sanskrit) Sūtrasthāna 12:11 (mūla) with commentary, checked against the source

> [mūla, Ca.Sū.12.11] marīciruvāca agnireva śarīre pittāntargataḥ kupitākupitaḥ śubhāśubhāni karoti tadyathā paktimapaktiṃ darśanamadarśanaṃ mātrāmātratvam ūṣmaṇaḥ prakṛtivikṛtivarṇau śauryaṃ bhayaṃ krodhaṃ harṣaṃ mohaṃ prasādam ityevamādīni cāparāṇi dvaṃdvānīti // [Āyurvedadīpikā ad loc., Cakrapāṇi's voice, not Charaka's] pittāntargata iti vacanena śarīre jvālādiyuktavahniniṣedhena pittoṣmarūpasya vahneḥ sadbhāvaṃ darśayati na tu pittādabhedaṃ pitte nāgnimāndyasya grahaṇyadhyāye vakṣyamāṇatvāt tathā pittaharasya sarpiṣo'gnivardhanatvenoktatvāt

tr. none (Sanskrit mūla + commentary) · http://gretil.sub.uni-goettingen.de/gretil/corpustei/transformations/plaintext/sa_agniveza-carakasaMhitA-parts-comm.txt

Cakrapāṇi's gloss on pittāntargata, in his own voice and not Charaka's: by that word Charaka rules out a flame-bearing fire (jvālādiyukta-vahni) in the body and establishes a fire whose form is the heat of pitta (pittoṣmarūpasya vahneḥ sadbhāvam), while still not asserting its non-difference from pitta (na tu pittād abhedam). His two reasons are that agnimāndya is to be treated in the Grahaṇī chapter without being located in pitta, and that ghee, which reduces pitta, is nonetheless described as increasing agni. This is the key text for the agni/pitta disambiguation and the locus where agnimāndya enters the commentarial layer.

### Sushruta Saṃhitā Sūtrasthāna XXI (Vraṇapraśna):prose section, pp. 196-197 of Bhishagratna vol. I, checked against the source

> Now it may be asked whether the Pittam is identical with the elemental fire, or is it something other than that ? The question may be answered by stating that the Pittam is the same as fire. Since such symptoms, as a burning sensation, digestion (boiling), and all other characteristics of fire can never exhibit themselves in the human body without the intervention of Pittam. Pittam therefore is called internal fire. ... There is no other fire (heat making factor) in the organism than Pittam.

tr. Kaviraj Kunja Lal Bhishagratna · https://archive.org/stream/b24758619_0001/b24758619_0001_djvu.txt

Sushruta's contrary doctrine: agni IS pitta, and there is no separate fire in the body. Charaka/Cakrapāṇi and Sushruta disagree on this point, which is the single most important thing a lexicon entry on agni has to record.

### Sushruta Saṃhitā Sūtrasthāna XXXV (Ātura-upakramaṇīya):27, checked against the source

> The fire, that burns within a person, is godly in its subtle essence, and possesses the divine attributes of atom-like invisibility, weightlessness, etc., and is the digestant of food. It takes up the lymph chyle of different tastes for the purpose of digestion, and is invisible owing to its extremely subtle essence.

tr. Kaviraj Kunja Lal Bhishagratna · https://archive.org/stream/b24758619_0001/b24758619_0001_djvu.txt

Public-domain English for Su.Sū.35.27. Bhishagratna dissolves the compound 'jāṭhara ... agni' into 'the fire that burns within a person'; the Sanskrit verse number is fixed independently from sa.wikisource.

## The concept record for this term

A term entry answers what the word means. It does not answer whether the thing the word
names is settled, and often it is not. That is what the concept record is for: it sets out
the questions on which the sources disagree about this term, with each position attributed,
and states what is not established.

- [Agni and digestion](https://nighantu.ageayurveda.com/concept/agni-and-digestion/)

## Not to be confused with

- **pitta.** Sushruta Sū.21 says there is no fire in the body other than pitta; Charaka Sū.12.11 says agni is 'within pitta' (pittāntargata) and Cakrapāṇi expressly denies their non-difference. Treating agni and pitta as synonyms silently picks a side in a live classical dispute.
- **ūṣman / ūṣmā.** ūṣman is heat as a property or measurable warmth; agni is the functional agent that produces transformation. Kaviratna translates both as 'heat', which loses the distinction.
- **kāyāgni.** WHO ISTA gives kāyāgni its own term ID (ITA-2.6.2, 'Metabolic factors of the body') distinct from agni (ITA-2.6.1). Much textbook writing uses the two interchangeably.
- **bala / agnibala.** agnibala is the strength or capacity of agni, the thing questionnaires actually measure (PMID 27381899), not agni itself.
- **Agni the Vedic deity.** Pure homonym. Search results and lay sources routinely conflate the physiological term with the fire god.

## Renderings that do not hold

- digestive enzyme(s). Reduces a whole-body regulatory concept spanning gut, tissue and elemental levels to a class of proteins. Bhishagratna's own 1907 gloss ('bile and pancreatic secretions') already shows this compression happening, and it does not survive contact with dhātvagni or bhūtāgni.
- metabolism. Drops the specifically digestive/gastrointestinal sense and, more importantly, drops the normative claim (agni as 'root' of lifespan and health) that the classical texts make. WHO's compound 'digestive, metabolic factors' is a deliberate repair of this.
- digestive fire (taken literally). Acceptable as a calque and used by both public-domain translators, but it invites literal thermal readings ('raising body heat'). Su.Sū.35.27 explicitly calls it invisible and subtle, not thermal.
- gastric acid / stomach acid. A modern popular equation with no classical warrant; it cannot account for the seven tissue-level agnis.

## Open questions

Recorded rather than resolved.

- Does WHO ISTA document why it rejected 'fire' for 'factors'?
- Is there a critical edition consensus on whether Ca.Sū.12.11's pittāntargata implies identity or containment?
- Which of the three competing Agni/Agnibala/Jāṭharāgni questionnaires, if any, has been validated against an external physiological criterion?

## Citation

Age Ayurveda Nighantu, "agni", https://nighantu.ageayurveda.com/lexicon/agni/, CC BY 4.0.
Whole lexicon: https://nighantu.ageayurveda.com/lexicon.json and https://nighantu.ageayurveda.com/lexicon.csv.

Educational reference only. A term entry explains what a word means and how it has been
translated. Nothing here is advice.