“泥泞的，因外来物质而污浊的，浓稠的，不清晰的”，1620年代，来自拉丁语 turbidus “泥泞的，充满混乱的”，源自 turbare “使困惑，使迷惑”，再源自 turba “骚乱，群众”，其起源不确定。De Vaan 写道：
Turba seems most similar to [Greek syrbe, Attic tyrbe] 'noise, commotion', ... which are probably loanwords. In that case, Latin would have borrowed the word from a Greek dialect, or both Greek and Latin borrowed it from a third source. In view of the quite well-developed word family already in Plautus, which suggests that turba had been in the language for some time, the latter option seems preferable.
与 disturb、trouble、turbine 相关。用于描述液体的沉淀被搅动，后来也用于描述颜色，并扩展为“混乱的，杂乱无章的”（1640年代）。中英语医学写作使用 turbide (adj.) “受损的，因病痛而受困扰的”（15世纪初）。相关词： Turbidly； turbidness。
