悉

all, entirely, altogether, completely, use up, run out of, exhaust, befriend, serve

On

シツ、シチ

Kun

つ(きる)、ことごと、ことごと(く)、つ(くす)、つぶさ(に)

Outside the JLPT lists·Jinmeiyō (names)·11 strokes·Radical 心