waste1
/weɪst वेस्ट्/ verb [T] 1 waste something (on somebody/something) ; waste something (in doing something) to use or spend something in a careless way or for something that is not necessary किसी वस्तु की बरबादी करना (लापरवाही से या बिना ज़रूरत उसे इस्तेमाल या ख़र्च करना)
He wasted his time at university because he didn’t work hard.
She wasted no time in decorating her new room [she did it immediately].