不勢 is read as ぶぜい (buzei) and means few.
ぶぜい
buzei
きょせいふあん
castration anxiety
けいせいふり
situation (turn of events) being unfavorable (disadvantageous)
ふきょう
depression
ふかのう
impossible
ふかけつ
indispensable
ふか
failing grade
ふきそく
irregularity
ふじゅん
irregular
ふかい
indisposition
ふかかい
incomprehensible
ふもう
unproductive (e.g. discussion)
impure