tamas: what the term means and how it is translated
tamas तमस् is an Ayurvedic technical term. It is rendered into English in 5 different ways, which is the reason this page exists: the renderings do not agree, and the difference between them changes what the term is taken to mean.
| Transliteration | tamas |
|---|---|
| Devanagari | तमस् |
| Also written | tamaḥ, tamo |
| Category, as gathered | prakriti |
| Grouped here under | Regimen and constitution |
| 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.
Inertia
WHO International Standard Terminologies on Ayurveda (2022) · ITA-1.9.4.5 (tamaḥ) · standard
'Characterized by darkness, ignorance and laziness, it is capable of vitiating the mind.' WHO chooses a physics word over the older translators' moral vocabulary.
Reproduced unaltered and attributed from the WHO International Standard Terminologies on Ayurveda, which is what that licence permits. It is deliberately absent from the downloadable dataset, which is offered under CC BY 4.0 and invites the modification a NoDerivs licence forbids.
inertia (tamas)
WHO International Standard Terminologies on Ayurveda (2022) · ITA-1.9.4.2 (triguṇāḥ) · standard
Within the triguṇa entry.
Reproduced unaltered and attributed from the WHO International Standard Terminologies on Ayurveda, which is what that licence permits. It is deliberately absent from the downloadable dataset, which is offered under CC BY 4.0 and invites the modification a NoDerivs licence forbids.
Darkness
Charaka Samhita, tr. Kaviratna (1896-1913) · Vimanasthana 6 and throughout · translation
Literal and therefore defensible, but in English it reads as metaphor where the Sanskrit is technical.
Tamashika stamp
Sushruta Samhita, tr. Bhishagratna (1907-1916) · Sharirasthana I v.19 · translation
Adjective plus trait list rather than a noun translation.
Tamasi-nidra
Sushruta Samhita, tr. Bhishagratna (1907-1916) · Sharirasthana IV v.33-34 · translation
Shows tamas doing physiological work, not only psychological.
The classical passages
Each citation gives its address so a reader can check it in a printed edition, our account of what the passage establishes, and the result of reading it against its source.
Charaka SamhitaVimanasthana 6:5 · checked against the source
रजस्तमश्च मानसौ दोषौ| तयोर्विकाराः कामक्रोधलोभमोहेर्ष्यामानमदशोकचित्तोद्वेगभयहर्षादयः||५||
Tamas is one of the two mental doṣas. Same locus as rajas; the two are never introduced separately here.
Charaka SamhitaSharirasthana 4:39 · checked against the source
इत्येवं तामसस्य सत्त्वस्य त्रिविधं भेदांशं विद्यान्मोहांशत्वात्||३९||
Three tāmasa sattva types characterised by moha, closing at verse 39; with 37 and 38 this completes the sixteen.
Charaka SamhitaSharirasthana 4:40 · checked against the source
तामसस्यत्रिविधः पशुमत्स्यवनस्पतिसत्त्वानुकारेण||४०||
Names the three tāmasa types after the natures of beasts, fish and plants.
Charaka SamhitaVimanasthana 6 · checked against the source
Rajas ( Passion ) and Tamas ( Darkness ) are the faults of the mind.
Public-domain English for the mental-doṣa statement. Verse left blank deliberately: the Sanskrit number 5 is recorded on the Sanskrit entry, and Kaviratna's own marker is 7.
Sushruta SamhitaSharirasthana 1:19 · checked against the source
Despondency, stupidity, disbelief in the existence of God, impiety, stupification and perversity of intellect, lethargy in action and sleepiness are the qualities which mark a mind of a Tamashika stamp .
Sushruta's tāmasa trait list, mixing cognitive, moral and somnolent features.
Sushruta SamhitaSharirasthana 4:33-34 · checked against the source
A man of Tamisika-temperament sleeps both in the day and night; one of the Rajasika-temperament sleeps either in the day or in the night; while sleep never visits the eyelids of a man of Sattvika -temperament before midnight.
An observable criterion for guṇa dominance, sleep timing, which is rare in this material.
Where this term does work in the theory
One concept record names this term as one of its components, and glosses it there as follows.
- Manas and the triguna: mind, sattva, rajas and tamas in health as Tamas
- A manasa dosha: inertia, stupefaction, delusion, heedlessness. Vitiates the mind by obscuration
Not to be confused with
- tamas = fainting or blackout
- Ayurvedic clinical Sanskrit uses tamaḥ-praveśa and related compounds for darkening of vision and syncope. A bare 'tamas' in a symptom list is very likely this, not the guṇa.
- tamas = darkness (literal)
- The ordinary sense, including the darkness of night relevant to dinacaryā and nidrā physiology.
- kapha
- Popular writing equates them on shared heaviness. Vi 6/5 keeps mental and bodily doṣas separate, and Sushruta Sharira 1/21 assigns tamas to pṛthvī and water.
- moha
- Sha 4/39 says the tāmasa types are so called from their moha portion. moha is a vikāra of the mental doṣas, not a synonym for tamas.
Renderings that do not hold
- Darkness. Etymologically accurate, but in English it carries moral overtones that make Vi 6/5 read as theology rather than a classification of disease causes.
- the kapha guna. Category error; guṇas and doṣas are parallel schemes, not levels of one.
- laziness. One of WHO's listed characteristics, but the guṇa also covers ignorance, delusion and the physiology of sleep.
Open questions
Recorded rather than resolved. Each one is something this entry cannot currently settle.
- Does any classical source state the tamas-kapha correspondence that modern writing assumes? None was found, and Sushruta Sharira 1/21 points the other way.
How to cite this entry
Age Ayurveda Nighantu, tamas
, https://nighantu.ageayurveda.com/lexicon/tamas/, CC BY 4.0.
The whole lexicon is downloadable from the index.
Machine-readable source: Markdown.
Data exported 2026-10-08.
Educational reference only. A term entry explains what a word means and how it has been translated. Nothing here is advice, and nothing here describes how any condition should be treated.