noun, noun or participle which takes 'suru', intransitive verb
strenuous effort; exertion; spurt
Intransitive use: making a strong, determined effort, often in a burst. Common in contexts of work, study, or physical activity.
試験前に奮発して徹夜で勉強した。
I made a strenuous effort and studied all night before the exam.
彼は最後の一周で奮発した。
He put on a spurt in the final lap.
noun, noun or participle which takes 'suru', transitive verb
splurge; treat oneself; spend extravagantly
Transitive use: spending more than usual on something desirable, often as a treat or special occasion. The object is marked with を or に.
ボーナスで奮発して新しいパソコンを買った。
I splurged on a new computer with my bonus.
たまには奮発して高いレストランに行こう。
Let's treat ourselves and go to an expensive restaurant for once.