apologise · verb I /əˈpɒl.ə.dʒaɪz/
apologise
B1 to tell someone that you are sorry about something you have done
Dictionary examples:
I must apologise to Isobel for my behaviour.
Trains may be subject to delay - we apologise for any inconvenience caused.
She apologised for having to leave early.
Learner example:
I'm writing to apologise because I won't be at tomorro[w]'s class. (Preliminary English Test; B1; Spanish)