(informal) combines with the verb stem to create an imperative as a kind of strong request

Used to give an order or command in a polite and instructive manner

reduction

decrease / reduce / diminish

(honorific) to do (honorific version of する)

imperative form of (honorific) look, see

reason / origin / history / oral tradition

(colloquial, informal) good / (colloquial, predicative only) enough, not wanted any more

committee

committee