somehow; for some reason; without knowing why
Expresses a vague feeling or action done without a clear reason or conscious intention. Often used when the speaker cannot pinpoint why they feel or act a certain way.
なんとなく今日は外に出たくない。
For some reason, I don't feel like going out today.
彼の言っていることがなんとなくわかった。
I somehow understood what he was saying.
なんとなく空を見上げたら、虹が出ていた。
I happened to look up at the sky and saw a rainbow.
I somehow felt I understood what he was saying.
I feel somehow lonely today, for no particular reason.
His attitude bothers me somehow, though I can't say exactly why.
I somehow have a feeling it's going to rain.