Etymology
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Words related to expectorate

ex- 
word-forming element, in English meaning usually "out of, from," but also "upwards, completely, deprive of, without," and "former;" from Latin ex "out of, from within; from which time, since; according to; in regard to," from PIE *eghs "out" (source also of Gaulish ex-, Old Irish ess-, Old Church Slavonic izu, Russian iz). In some cases also from Greek cognate ex, ek. PIE *eghs had comparative form *eks-tero and superlative *eks-t(e)r-emo-. Often reduced to e- before -b-, -d-, -g-, consonantal -i-, -l-, -m-, -n-, -v- (as in elude, emerge, evaporate, etc.).
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pectoral (adj.)

1570s, "of or pertaining to the breast or chest," from Latin pectoralis "of the breast," from pectus (genitive pectoris) "breast, chest," a word of unknown origin. De Vaan considers Old Irish ucht "breast, chest" as "a likely cognate, if it reflects earler *pektu-." Pectoral muscle is attested from 1610s.

expectorant (n.)

in medicine, "a drug which promotes or facilitates phlegm or other such matter from the body by means of expectoration," 1782, from Latin expectorantem (nominative expectorans), present participle of expectorare (see expectorate). From 1811 as an adjective.

expectoration (n.)

"act of discharging phlegm or mucus from the throat or lungs by coughing or hawking and spitting," 1670s, noun of action from expectorate.