This is the 665th most frequent Azerbaijani word.
bəzən
"sometimes"
'Bəzən' indicates an action that happens occasionally, not regularly.
Mən bəzən kitab oxuyuram.
I sometimes read books.
The use of 'bəzən' here shows that the cheerful behavior is not constant but occurs periodically.
O, bəzən çox şən olur.
He/She is sometimes very cheerful.
The word 'bəzən' means 'sometimes' and is used to express occasional occurrences.