simmer
US /ˈsɪm.ɚ/
UK /ˈsɪm.ɚ/

1.
mijoter, frémir
to stay just below the boiling point while being heated
:
•
Let the sauce simmer for 20 minutes.
Laissez la sauce mijoter pendant 20 minutes.
•
The soup should simmer gently, not boil vigorously.
La soupe doit mijoter doucement, pas bouillir vigoureusement.
2.
couver, mijoter
to be in a state of suppressed anger or excitement
:
•
Her anger continued to simmer beneath the surface.
Sa colère continuait de couver sous la surface.
•
Tensions have been simmering between the two countries for months.
Les tensions couvent entre les deux pays depuis des mois.