to behave badly or cause trouble
se comporter mal ou causer des problèmes (se comporter mal ou kauser de problèm)
"The kids started to act up during the long car ride."
"Les enfants ont commencé à faire des bêtises pendant le long trajet en voiture." (Les enfan on komancé à **fer de betiz** pendant le long trajé en voytur)
to speak angrily and quickly to someone
to make something increase in value or price
to stop increasing or decreasing and stay at the same level
to give in or collapse under pressure
to make investors feel more positive about investing
to inform someone about all updates or developments