Etymology
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phone (n.2)

"elementary sound of a spoken language, one of the primary elements of utterance," 1866, from Greek phōnē "sound, voice" (from PIE root *bha- (2) "to speak, tell, say").

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sonorous (adj.)

1610s, from Latin sonorus "resounding," from sonor "sound, noise," from sonare "to sound, make a noise" (from PIE root *swen- "to sound"). Related: Sonorously; sonorousness. Earlier was sonouse (c. 1500), from Medieval Latin sonosus; sonourse "having a pleasing voice" (c. 1400), from sonor + -y (2).

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rub-a-dub (n.)
1787, echoic of the sound of a drum.
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purr (v.)

"uttering a low, murmuring sound expressive of satisfaction or pleasure, as a cat," 1610s, of imitative origin. Related: Purred; purring. As a noun, "sound made by a purring cat,"  from c. 1600. A similar imitative word, curr "make a low murmuring sound, purr" (1670s), was used of doves and cats.

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um 
a sound denoting hesitation, 1670s.
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jug (interj.)
representing the sound of the nightingale, 1530s.
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twang (n.)
1550s, of imitative origin. Originally the sound of plucked bows and strings; extension to "a nasal vocal sound" is first recorded 1660s. The verb is first attested 1540s. Related: Twanged; twanging.
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bong (n.1)

bell-sound, 1918, imitative.

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resonance (n.)

mid-15c., resonaunce, in acoustics, "prolongation or repetition of sound by reflection, reverberation;" from Old French resonance (15c.) and directly from Latin resonantia "an echo," from resonare "to sound again, sound back" (see resound). Earlier in same sense was resonation (early 15c.). From 1660s as "act of resonating."  

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liquid (n.)
"a liquid substance," 1708, from liquid (adj.). Earlier it meant "sound of a liquid consonant" (1520s), following Latin liquidae, Greek hygra, applied to letters of an easy, "flowing" sound.
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