Inhale

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early 18th century: from Latin inhalare ‘breathe in’, from in- ‘in’ + halare ‘breathe’.

wiktionary

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From Latin inhalare(“to breathe on (breathe in)”), from in(“in, into, on”) + halare(“to breathe”).

etymonline

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inhale (v.)

1725, "to breathe in, draw air into the lungs," a back-formation from inhalation or else from French inhaler in this sense; used as a word to be the opposite of exhale. Slang sense of "eat rapidly" is recorded from 1924. As a noun, "act of inhaling," by 1904. Related: Inhaled; inhaling.