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expectorate (v.)

c. 1600, "to clear out the chest or lungs," a literal use of Latin expectoratus, past participle of expectorare, which in classical use was figurative, "scorn, expel from the mind," literally "drive from the breast, make a clean breast," from ex "out" (see ex-) + pectus (genitive pectoris) "breast" (see pectoral (adj.)). Its use as a euphemism for "spit" is recorded by 1827. The classical Latin figurative sense appears in English 17c. but is now obsolete. Related: Expectorated; expectorating.

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Definitions of expectorate

expectorate (v.)
clear out the chest and lungs;
This drug expectorates quickly
Synonyms: clear out / drive out
expectorate (v.)
discharge (phlegm or sputum) from the lungs and out of the mouth;
Synonyms: cough up / cough out / spit up / spit out
From wordnet.princeton.edu