temper · noun /ˈtem.pər/
temper
B2 C usually no plural when someone becomes angry very quickly
Dictionary examples:
She has a real temper.
He's got a really bad temper.
Learner example:
He was a very complicated character who had a bad temper and was easily angered. (First Certificate in English; B2; Portuguese)
lose your temper
B2 to suddenly become angry
Dictionary example:
The children behaved so badly that I lost my temper.
Learner example:
Yesterday, I must confess, I lost my temper with my son. (First Certificate in English; B2; Portuguese)
keep your temper
C2 to succeed in staying calm and not becoming angry
Dictionary example:
It was hard to keep my temper with so many things going wrong.
Learner example:
He never offends people and he keeps his temper even if someone insults him. (Certificate of Proficiency in English; C2; German)