This is the 3185th most frequent Chinese word.
何处
"何处" means "where" or "what place."
In this sentence, '何处' is used to ask about a specific location, emphasizing uncertainty or inquiry about 'where'.
何处是我们最终的归宿？
Where is our final destination?
Here, '何处' delves into an abstract realm, questioning the 'where' of truth or meaning rather than a physical location.
他不断思考人生的意义，并头问心：何处为真？
He keeps pondering the meaning of life and asks himself: where lies the truth?
This usage of '何处' is practical and direct, targeting a specific physical location for the lost keys.