This is the 176th most frequent Hebrew word.
בקרב
"Among," "within," or "in the midst of."
The word בקרב here denotes 'among' and shows membership or inclusion within a group.
בקרב חבריו, הוא ידוע בכינויו המיוחד.
Among his friends, he is known by his special nickname.
In this sentence, בקרב refers to a 'battle,' indicating an armed conflict or struggle.
הוא נהרג בקרב קשה מול האויב.
He fell in a tough battle against the enemy.
The word בקרב here is used to indicate an activity taking place within a defined group.