Irritable
来自Big Physics
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mid 17th century: from Latin irritabilis, from the verb irritare (see irritate).
wiktionary
Borrowed from French irritable, from Latin irritabilis
etymonline
irritable (adj.)
1660s, "susceptible to mental irritation," from French irritable and directly from Latin irritabilis "easily excited," from irritare "excite, provoke" (see irritate). Meaning "responding quickly to a stimulus" is from 1791. Related: Irritably.
