bottle up
US /ˈbɑː.t̬əl ʌp/
UK /ˈbɑː.t̬əl ʌp/

1.
refouler, garder pour soi
to keep a strong emotion inside you and not express it
:
•
It's not healthy to bottle up your feelings.
Ce n'est pas sain de refouler vos sentiments.
•
He tends to bottle up his anger until it explodes.
Il a tendance à refouler sa colère jusqu'à ce qu'elle explose.