This is the 390th most frequent Azerbaijani word.
digər
"Other" or "another."
'digər' here is used as an adjective to specify a different room than the current one.
O, digər otaqda idi.
He was in the other room.
'digər' modifies 'hissəsini', meaning the remaining or another part.
Kitabların digər hissəsini də oxudum.
I also read the other part of the books.
'digər' refers to different individuals apart from the referenced group or individual.