s'immiscer

to interfere; to meddle; to intrude

→ se
phrase Rare #39,799
to interfere; to meddle; to intrude A formal or neutral verb meaning to interfere or intrude, often used with « dans » when referring to someone's private life, affairs, or decisions. It can also be used with « sur » in contexts involving territory or influence.
FR: Je ne les laisserai pas s'immiscer.
EN: I won't let them interfere.

Il ne permettrait à personne de s'immiscer dans ses affaires personnelles.

He wouldn’t let anyone interfere in his personal affairs.

Je ne les laisserai pas s'immiscer.

I won't let them interfere.

Il ne laissait personne s'immiscer dans sa vie privée.

He didn’t let anyone meddle in his private life.

Il tente de s'immiscer sur mon territoire et d'obtenir une part du gâteau.

He's trying to encroach on my territory and get a slice of the pie.