"somewhere (to)" is Куда-нибудь in Russian.
Куда-нибудь means "somewhere (to)" in English.
Listen to the pronunciationWord #1345 of 4,000 by frequency in Russian — level B1.
Давай поедем куда-нибудь на выходные, надоело сидеть дома.
Let's go somewhere for the weekend, I'm tired of staying home.