部族 is read as ぶぞく (buzoku) and means tribe.
ぶぞく
buzoku
はんぶぞく
half tribe
ぶちょう
head (chief, director) of a section or department
ぶぶん
portion
ぶひん
parts
ぶか
subordinate person
へや
stable
ぶしゅ
radical (of a kanji character)
ぶかい
section meeting
ぶいん
staff
ぶない
the staff
ぶすう
number of copies
ぶ
counter for copies of a newspaper, magazine, book, etc.