adverb, noun, noun or participle which takes 'suru'
suddenly; instantly; overnight
Describes a rapid, dramatic rise to fame, success, or prominence. Often used with verbs like 有名になる, 出世する, or トップに立つ.
彼はその映画で一躍有名になった。
He suddenly became famous with that movie.
The new product instantly gained the top market share.
noun, noun or participle which takes 'suru'
one bound; one leap
Original literal meaning of a single jump or leap. Now rare and mostly found in classical or literary contexts; the modern sense is overwhelmingly the figurative 'sudden rise'.
古語では「一躍」を文字通りひと跳びの意味で使った。
In classical language, 一躍 was used literally to mean a single leap.