LATIN DICTIONARYLexicon Latīnum
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“conscious” in Latin

The English word conscious itself goes back to Latin sciō, through cōnscius.

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

conscious
To be conscious, conscium sibi esse alicujus rei, or with accusative and infinitive: not to be conscious of any guilt, not to be conscious of anything, nullius sibi culpae conscium esse, nihil conscire sibi (Hor., Ep., 1, 1, 61): I am perfectly conscious of it, bene memini. I am conscious how, that, etc., scio (if it is a matter of knowledge): sentio (if it is a felt conviction; e.g., si quid est in me ingenii, quod sentio quam sit exiguum, Cic.). I am not conscious that I was ever, etc., conscius mihi sum, numquam me fuisse, etc. (Cic.).

Quick answer

What is the Latin word for conscious?
The usual Latin words for “conscious” are sciō, sentiō. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.