調べる

Etymology
The seemingly unrelated senses "to investigate" and "to play an instrument" are probably a  via kanbun kundoku.

Verb

 * 1) to investigate, to look up, to look into, to study, to examine, to check up on, to look over
 * 2)  to play, to perform (an instrument)
 * 3)  to tune
 * 1)  to play, to perform (an instrument)
 * 2)  to tune
 * 1)  to tune