かす
kikasu

Godan Verb (su)

1. to 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

Transitive
Related to 利かせる
Godan Verb (su)

2. to use (tact, wit, etc.); to exercise; to display

Transitive
Related to 気を利かす
Other forms: