The word 'critic' entered English in the late sixteenth century from Latin 'criticus,' itself borrowed from Greek 'kritikós' (κριτικός), meaning 'able to make judgements' or 'skilled in discerning.' The underlying verb is 'krinein' (κρίνειν), 'to separate, to decide, to judge,' which traces back to Proto-Indo-European *krey-, meaning 'to sieve' or 'to separate.' At its deepest level, a critic is a sifter — someone who separates wheat from chaff.
Greek 'krinein' produced a constellation of words that became fundamental to Western intellectual vocabulary. 'Krisis' (κρίσις) meant 'a separating, a decision, a judgement' — a crisis is a moment that demands a decision, a turning point. 'Kritḗrion' (κριτήριον) was a means of judging, a standard — a criterion. 'Kritḗs' (κριτής) was a judge. Aristotle used 'kritikḗ' (κριτική) for the art of judgement, particularly in assessing poetry and rhetoric.
The Latin cognate of Greek 'krinein' is 'cernere' (to sift, to separate, to decide), which gave English 'discern,' 'concern,' 'certain,' 'secret,' and 'decree.' The split between the Greek and Latin branches of *krey- means that English has two parallel families of judgement-words: the Greek family (critic, crisis, criterion) and the Latin family (discern, certain, decree), all from the same Proto-Indo-European source.
In English, 'critic' initially referred to a scholar who judged and edited texts — a textual critic. The first major English use is often attributed to the 1580s, when the word appeared in discussions of literary evaluation. By the seventeenth century, 'critic' had broadened to mean any person who evaluates works of art, literature, music, or drama. The great age of English literary criticism — Dryden, Pope, Johnson, Coleridge, Arnold, Eliot — established the critic as a central figure in cultural life.
The word quickly developed a negative connotation alongside the neutral one. To 'criticise' came to mean not merely to evaluate but to find fault. Alexander Pope captured this tension in 'An Essay on Criticism' (1711), where he depicted the ideal critic as learned, fair, and humble — implicitly acknowledging that most critics fell short. The figure of the harsh, destructive critic became a literary type: the person who cannot create but delights in tearing down what others have made.
A subtler relative is 'hypocrisy,' from Greek 'hypokrisis,' originally meaning 'acting on a stage, playing a part.' The verb 'hypokrinesthai' combined 'hypo-' (under, beneath) with 'krinein' — literally 'to judge from below,' which came to mean 'to answer, to interpret, to play a role.' In ancient Greek, a 'hypokritḗs' was an actor. The moral sense — someone who pretends to have beliefs or virtues they do not actually hold — developed because acting was associated with deception.
The adjective 'critical' has taken on distinct meanings in different domains. In medicine, a 'critical' condition is one at a crisis point — the patient could go either way. In nuclear physics, 'critical mass' is the minimum amount of fissile material needed to sustain a chain reaction — a literal point of no return. In philosophy and social theory, 'critical thinking' and 'critical theory' use 'critical' in its original Greek sense: the practice of careful, systematic judgement.
The word's journey from sifting grain to evaluating art to finding fault encapsulates a persistent human tension: we need people who can separate the good from the bad, but we resent being on the wrong side of the sieve.