turbid (adj.)

1620s, from Latin turbidus "muddy, full of confusion," from turbare "to confuse, bewilder," from turba "turmoil, crowd," probably from Greek tyrbe "turmoil, tumult, disorder," from PIE *(s)twer- (1) "to turn, whirl" (see storm (n.)). Related: Turbidly; turbidness.

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