gâcher

/ɡa.ʃe/
1.
verbInf1st

to spoil

to ruin

to damage

La pluie a gâché la fête.

The rain ruined the party.

2.
verbInf1st

to waste

to squander

Tu es en train de gâcher ton talent avec ce boulot.

You are wasting your talent with this job.