noun
somewhere; some place
Indicates an unspecified or unknown location. Often used in expressions like どこやらへ行く or どこやらで見かける.
彼はどこやらへ出かけてしまった。
He went off somewhere.
どこやらで聞いたことのある声だ。
It's a voice I've heard somewhere before.
adverb
Adverbial use indicating an unspecified manner or reason. Less common than the locative sense; often interchangeable with どうやら.
どこやら様子がおかしい。
Somehow things seem strange.
Compound of どこ (where) and やら (indeterminate particle, from classical Japanese). The exact historical development is uncertain.