expression, i-adjective
make good use of; make the most of; not waste
Used to express the idea of using something effectively without wasting it. Often appears as a negative form of 無駄にする (to waste).
See also: 無駄にする
時間を無駄にしないように、計画を立てよう。
Let's make a plan so we don't waste time.
彼は与えられたチャンスを無駄に
He didn't waste the chance he was given.