Godan verb with 'ku' ending, Intransitive verbto be effective; to take effect; to be good (for) · to work; to function well · to be possible (to do, use, etc.); to be able to

Godan verb with 'su' ending, Transitive verbto bring out (the effect of); to put to good use; to make use of (e.g. threats); to use (e.g. intimidation); to take advantage of (e.g. one's influence); to season (with salt, etc.); to put in · to use (tact, wit, etc.); to exercise; to display