ended up using; used (unintentionally or regretfully)
→ 使う
使っConjunctive/continuative (て-form stem)+ちゃっCompletive (often regretful or accidental)+たPast tense
verb · past indicativeRare#34,614
ended up using; used (unintentionally or regretfully)A casual contraction of 使ってしまった, often expressing regret or that something happened unintentionally.