どこ（どこ）— where
どこですか。
Where is it?
どこどこ
where
どこ
accent [1]In detail
Words
どこdokowhere
ですdesu(polite sentence ending)
かka(question marker)
どこ asks about a place. It belongs to the same question-word family as どれ, “which one,” and どの, “which” before a noun.
Coco-sensei