This is the 4655th most frequent Arabic word.
اعتبره
"Considered it" or "regarded it."
In this sentence, 'اعتبره' means 'consider him' and expresses the subject's perception or evaluation of someone as having specific attributes (brother and friend).
اعتبره أخي وصديقي في نفس الوقت.
I consider him both my brother and my friend.
Here, 'اعتبره' conveys the speaker's judgment or opinion about someone's qualities or role (best teacher).
اعتبره مدرّسه الأفضل منذ سنوات.
He considered him the best teacher he has had in years.
In this sentence, 'اعتبره' describes the act of recognizing or assigning a specific role to someone (head of the company).