"quality or state of being an expert," 1868, from French expertise (16c.) "expert appraisal, expert's report," from expert (see expert (adj.)). Earlier and more English was expertness (c. 1600).
Entries linking to expertise
expert adj.
late 14c., "having had experience; skillful," from Old French expert, espert "experienced, practiced, skilled" and directly from Latin expertus (contracted from *experitus), "tried, proved, known by experience," past participle of experiri "to try, test," from ex "out of" (see ex-) + peritus "experienced, tested," from PIE *per-yo-, suffixed form of root *per- (3) "to try, risk." The adjective tends to be accented on the second syllable, the noun on the first. Related: Expertly; expertness.