Crossword Dictionary

EXPERTISE

expertness, expertise - n 
skillfulness by virtue of possessing special knowledge 

wordplays

Synonyms

chops, experience, know-how, moxie, proficiency, savvy, skills

merriam-webster

Examples

I would not recommend quickly chopping vegetables unless you have expertise with a knife.

When moving to another country, it is important to have expertise in the most common language.

Make sure to have someone with expertise in life-guarding around while you swim.

yourdictionary

Etymology

"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).

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.

etymonline