Etymology
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somato- 

before vowels somat-, word-forming element meaning "the body of an organism," from combining form of Greek sōma (genitive sōmatos) "the body, a human body dead or living, body as opposed to spirit; material substance; mass; a person, human being; the whole body or mass of anything," a word of uncertain origin. Perhaps originally "compactness, swelling," and from PIE root *teue- "to swell."

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phono- 

word-forming element meaning "sound, voice," from Greek phōno-, combining form of phōnē "voice, sound" of a human or animal, also "tone, voice, pronunciation, speech" (from PIE root *bha- (2) "to speak, tell, say").

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-phone 

word-forming element meaning "voice, sound," also "speaker of," from Greek phōnē "voice, sound" of a human or animal, also "tone, voice, pronunciation, speech," from PIE root *bha- (2) "to speak, say, tell" (source also of Latin for, fari "to speak," fama "talk, report").

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