Frontière (en. Border)

/fʁɔ̃.tjɛʁ/

Synonyms

Slang Meanings

To have strict limits.
One should not cross the boundaries of what is acceptable.
Il ne faut pas franchir les frontières de l'acceptable.
To be very rigid about one's principles.
She is always particular about her personal boundaries.
Elle est toujours à cheval sur ses frontières personnelles.