rendrai

/ʁɑ̃dʁe/rendre
1.
verbInd3rdFutSing1

give back

return (something borrowed or taken)

Je te rendrai tes clés demain matin.

I'll give you back your keys tomorrow morning.

2.
verbInd3rdFutSing1

make (someone feel or become a certain way)

cause (something to be in a certain state)

Je te rendrai heureux si tu acceptes de venir.

I'll make you happy if you agree to come.