somehow
$ \mathrm{somehow} /ˈsʌmhaʊ/
1 (also North American English, informal someway, someways)
in a way that is not known or certain
We must stop him from seeing her somehow.
Somehow or other I must get a new job.
2 for a reason that you do not know or understand
Somehow, I don't feel I can trust him.
She looked different somehow
somehow は、理由を述べることをあえてしない、またはできないことを示す。先行の内容で理由となるものは一つもない。この点で、前述の一つまたは複数の理由に後から言及する therefore とは異なる。