waste [wasted, wasting, wastes]◼◼◼(to squander) verb [UK: weɪst] [US: ˈweɪst]You're wasting your effort. = Vous gâchez vos efforts.
spoil [spoilt, spoiling, spoils]◼◼◼(ruin) verb [UK: spɔɪl] [US: ˌspɔɪl]You spoiled everything. = Tu as tout gâché.
mess up◼◼◻(to make a mess of) verb [UK: mes ʌp] [US: ˈmes ʌp]
squander [squandered, squandering, squanders]◼◼◻(to waste) verb [UK: ˈskwɒn.də(r)] [US: ˈskwɑːn.dər]He has squandered every opportunity I've given him. = Il a gâché toutes les chances que je lui ai données.