let off

US /lɛt ɔf/
UK /lɛt ɔf/
"let off" picture
1.

relâcher, laisser partir

to not punish someone who has committed a crime or done something wrong, or to punish them less severely than you could

:
The judge decided to let him off with a warning.
Le juge a décidé de le relâcher avec un avertissement.
She was caught shoplifting, but the store manager let her off.
Elle a été prise en flagrant délit de vol à l’étalage, mais le gérant du magasin l’a laissée partir.
2.

lancer, tirer

to make a bomb, firework, or gun fire or explode

:
They decided to let off fireworks at midnight.
Ils ont décidé de lancer des feux d’artifice à minuit.
The gun accidentally let off a shot.
Le pistolet a accidentellement tiré un coup.
3.

libérer, évacuer

to allow gas, air, or steam to escape from something

:
He let off some steam by shouting.
Il a évacué un peu de vapeur en criant.
The valve lets off excess pressure.
La valve libère la pression excessive.