store up
US /stɔːr ʌp/
UK /stɔːr ʌp/

1.
stocker, accumuler
to keep a lot of something so that you can use it later
:
•
Squirrels store up nuts for the winter.
Les écureuils stockent des noix pour l'hiver.
•
She stored up enough food to last for weeks.
Elle a stocké suffisamment de nourriture pour durer des semaines.
2.
accumuler, emmagasiner
to build up a lot of something, especially feelings or energy, over time
:
•
He's been storing up anger for years.
Il a accumulé de la colère pendant des années.
•
The battery can store up a lot of energy.
La batterie peut stocker beaucoup d'énergie.