léger

/le.ʒe/
1.
adjectivemasculine

light (in weight)

lightweight

Prends ce sac, il est vraiment léger.

Take this bag; it's really light.

2.
adjectivemasculine

slight; weak; superficial (not thorough or convincing, e.g. an argument)

Son argument est un peu léger pour nous convaincre.

His argument is a bit weak to convince us.

3.
adjectivemasculine

light; not intense or strong (about rain, flavor, pain, etc.)

mild

Il y a eu une légère pluie ce matin.

There was light rain this morning.

4.
adjectivemasculine

frivolous; flighty; not serious (of a person or behaviour)

C'est quelqu'un de léger : il ne mesure pas toujours les conséquences.

He's a bit flighty; he doesn't always consider the consequences.