1.
after all, in the end, ultimately
Used to express a resigned or realistic conclusion, often implying that something cannot exceed its fundamental nature or limitations.
所詮無理な話だ。
It's an impossible idea, when you get down to it.
所詮素人の考えだから、プロには通用しない。
It's an amateur's idea after all, so it won't pass muster with professionals.
どんなに頑張っても、所詮は一人の力には限界がある。
No matter how hard you try, ultimately there are limits to what one person can do.
USAGE:
Carries a negative or resigned nuance. It implies acceptance that something is limited by its nature. Often pairs with negative conclusions: 無理だ (impossible), 限界がある (there are limits), 通用しない (won't work).
NUANCE:
Unlike 結局 (in the end), which is neutral, 所詮 always carries a tone of resignation, dismissal, or realism. It suggests "when you strip away the pretense."
ETYMOLOGY:
Originally a Buddhist term meaning "the final outcome" or "the ultimate conclusion."