a·dept adjective əˈdept/ 1. very skilled or proficient at something. "he is adept at cutting through red tape" synonyms: expert, proficient, accomplished, skillful, talented, masterly, masterful, consummate, virtuoso; More antonyms: inept noun noun: adept; plural noun: adepts ˈadept,əˈdept/ 1. a person who is skilled or proficient at something. "they are adepts at kung fu and karate" synonyms: expert, past master, master, genius, maestro, doyen, virtuoso; More antonyms: amateur Origin mid 17th century: from Latin adeptus ‘achieved,’ past participle of adipisci ‘obtain, attain.’ Translate adept to Use over time for: adept
An act performed precisely once is hardly worthy of adept. Nobody has a resume touting "professional suicide bomber". It's an oxymoron. Schrödinger's cat might have a shot at it.