adverb
Expresses resignation or the idea that the outcome is inevitable regardless of effort. Often used when acknowledging a disappointing reality.
所詮、私には無理な話だった。
After all, it was an impossible task for me.
どんな
No matter how hard I try, in the end I'm still just an amateur.
adverb
(not) possibly; (not) at all; (not) by any means
Used with a negative predicate to emphasize impossibility or complete denial. Stronger than a simple negative.
そんなことは所詮ありえない。
That's simply not possible.
彼が謝るなんて所詮期待できない。
You can't possibly expect him to apologize.