proficiency/pɹəˈfɪʃənsi/EtymologyFrom proficient or its etymon, Latin prōficiēns (present participle of prōficiō), + -ency.proficiency means ability, skill, competence. Lexicurio rates it Distinctive — a strength score of 67 out of 100.nounAbility, skill, competence.“to attain (or to reach) proficiency”