An informal expression meaning 'somehow' or 'for some reason' used when the reason is unclear or vague.
今日はどこかしら気分が重い。
I feel down somehow today.
説明はしたけれど、どこかしら納得がいかない部分がある。
I was explained to, but there's still something that somehow doesn't sit right with me.
彼女の声は、どこかしら悲しげに聞こえた。
Her voice sounded somehow sad.
Used to refer vaguely to a place — 'somewhere' or 'somewhere or other'.
週末はどこかしら遠くへドライブに行きたい。
I want to go driving somewhere (someplace) far this weekend.
忘れ物はどこかしら家の中にあるはずだ。
The thing I forgot must be somewhere in the house.
旅行に行きたいけど、どこかしらいい案がないかな。
I want to travel, but I wonder if there's somewhere good to go.