late Middle English (in the figurative sense): from Latin turbidus, from turba 'a crowd, a disturbance'
Is it turbid or turgid? Turbid is used of a liquid or color to mean ‘muddy, not clear’: turbid water. Turgid means ‘swollen, inflated, enlarged’: turgid veins. Both turbid and turgid can also be used to describe language or literary style: as such, turbid means ‘confused, muddled’ (the turbid utterances of Carlyle), and turgid means ‘pompous, bombastic’ (a turgid and pretentious essay).