Verb (5-dan, す, transitive)
1.  to use up;  to exhaust;  to run out of
Verb (5-dan, す, intransitive)
2.  to devote oneself (to);  to do one's utmost (for);  to serve;  to work (for a cause)
3.  to do to exhaustion;  to do completely;  to do fully
after masu stem of verb