fermer

/fɛʁme/
1.
verbInf1stPresSing

to close, to shut (a door, window, box, book, eyes, mouth)

to close (an application, a document, a window on a screen)

to turn off/stop (a tap — fermer le robinet)

N'oublie pas de fermer la porte en partant.

Don't forget to close the door when you leave.

2.
verbInf1stPresSing

to shut down, to close (a business or establishment); to cease operating

Le magasin va fermer définitivement à la fin du mois.

The shop is going to close permanently at the end of the month.

3.
verb (pronominal usage common)Inf1stPresSing

to become closed off (emotionally); to shut oneself off

Depuis cette dispute, il a tendance à se fermer.

Since that argument, he tends to shut himself off.