This is the 558th most frequent Macedonian word.
сериозно
Seriously.
'Сериозно' here functions as an adverb, modifying the verb 'размислував' to indicate the intensity or manner of the action described.
Сериозно размислував за проблемот.
I seriously thought about the problem.
'Сериозно' serves as an adverb to express how the subject perceives or treats the 'предизвикот' (challenge).
Го зеде сериозно предизвикот.
He took the challenge seriously.
'Сериозно' acts as an adjective describing 'предупредување' (warning), giving it a characteristic of gravity or importance.