Etymology
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Words related to turbid

disturb (v.)

late 13c. distourben, "to frighten, alarm, break up the tranquility of;" c. 1300, "to stop or hinder;" from Old French destorber (Old North French distourber) and directly from Latin disturbare "throw into disorder," from dis- "completely" (see dis-) + turbare "to disorder, disturb," from turba "turmoil" (see turbid). Related: Disturbed; disturbing; disturbingly.

Middle English also had the verb as distourblen, from Old French destorbler; hence also distourbler (n.) "one who disturbs or incites" (late 14c.).

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disturbance (n.)

late 13c., "mental distress, emotional disorder of the mind, grief," from Old French destorbance (12c., Old North French distorbance), from destourber, from Latin disturbare "throw into disorder," from dis- "completely" (see dis-) + turbare "to disorder, disturb," from turba "turmoil" (see turbid).

Meaning "public disturbance, political agitation" is from c. 1300; that of "violent interruption of peace or unity" is late 14c.; it is the sense in disturbance of the (king's) peace," early 15c.

interturb (v.)
"to disturb by interruption" (obsolete), 1550s, from Latin inturbus, past participle of inturbare "disturb by interruption," from in- "in" (from PIE root *en "in") + turbare "to disturb, confuse" (see turbid). Related: Interturber (1530s).
perturb (v.)

late 14c., perturben, "disturb greatly, disturb mentally; cause disorder in," from Old French perturber "disturb, confuse" (14c.) and directly from Latin perturbare "to confuse, disorder, disturb," especially of states of the mind, from per "through" (from PIE root *per- (1) "forward," hence "through") + turbare "disturb, confuse," from turba "turmoil, crowd" (see turbid). Related: Perturbed; perturbing.

trouble (v.)
c. 1200, from Old French trubler, metathesis of turbler, torbler "to trouble, disturb; make cloudy, stir up, mix" (11c.), from Vulgar Latin *turbulare, from Late Latin turbidare "to trouble, make turbid," from Latin turbidus (see turbid). Related: Troubled; troubling.
turbidity (n.)

"state of being turbid," 1782, from Medieval Latin turbiditas, from Latin turbidus "muddy, full of confusion" (see turbid). Turbidity current is from 1939.

turbine (n.)

1838, "waterwheel driven by the impact or reaction of a flowing stream of water," from French turbine (19c.), from Latin turbinem (nominative turbo) "spinning top, eddy, whirlwind, that which whirls," related to turba "turmoil, crowd" (see turbid). Originally applied to a wheel spinning on a vertical axis driven by falling water, later of mechanisms driven by the flow of air. Turbo in reference to gas turbine engines is attested from 1904.

turbulent (adj.)

early 15c., "disorderly, tumultuous, unruly" (of persons), from Old French turbulent (12c.), from Latin turbulentus "full of commotion, restless, disturbed, boisterous, stormy," figuratively "troubled, confused," from turba "turmoil, crowd" (see turbid). In reference to weather, from 1570s. Related: Turbulently.