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The French word

gaspiller

means
to waste, squander 
Examples:
Tu gaspilles mon temps.
You're wasting my time.
Vous gaspillez mon temps.
You're wasting my time.
Ne gaspille pas ta salive.
Don't waste your breath.
Ne gaspillez pas votre salive.
Don't waste your breath.
Je ne gaspille pas de munitions.
I'm not wasting rounds.
Mon père ne gaspille pas son temps.
My father doesn't waste his time.
Je ne vais pas gaspiller mon argent.
I'm not going to waste my money.
Tu ne devrais pas gaspiller ton temps.
You should not waste your time.
Ne gaspille pas ton temps ni ton argent.
Don't waste your time and money.
Je ne peux me permettre de gaspiller le moindre yen.
I can't afford to waste a single yen.
Nous ne devons pas gaspiller nos réserves d'énergie.
We mustn't waste our energy resources. | We mustn't waste our energy stocks.
Aussi servez-vous en sagement et ne le gaspillez pas.
So use it wisely and don't waste it.
Nous ne devons pas gaspiller nos ressources énergétiques.
We mustn't waste our energy resources.
Tom regretta d'avoir gaspillé une grande partie de sa vie.
Tom regretted having wasted a great deal of his life.
Il finit son dîner car il n'aimait pas gaspiller la nourriture.
He finished his dinner because he didn't like to waste food.
Elle a éteint la lumière afin de ne pas gaspiller l'électricité.
She turned out the light so as not to waste electricity.
Ne gaspille pas ta jeunesse, autrement tu le regretteras plus tard.
Don't waste your youth, otherwise you'll regret it later.
Ses parents pensaient qu'il gaspillait son argent pour une fille stupide.
His parents' view was that he was wasting his earnings on a silly girl.
Ne gaspillez pas votre argent en achetant des choses dont vous n'avez pas besoin.
Don't waste your money by buying things you don't need.
Examples sourced from tatoeba.org