Word

弱勢

じゃくせい
inferiority; weakness
Word

勝勢

しょうせい
(favorable) odds
Word

飛ぶ鳥も落とす勢い

exp
とぶとりもおとすいきおい
great vigor; tremendous energy; forceful enough to knock down birds in flight
Word

怒濤の勢い

exp
どとうのいきおい
with great vigour; in leaps and bounds; with the force of surging waves
Word

雑種強勢

ざっしゅきょうせい
heterosis; hybrid vigor; hybrid vigour
Word

反社会的勢力

はんしゃかいてきせいりょく
antisocial forces; organized crime (euphemism)
Word

勢力均衡

せいりょくきんこう
balance of power
Word

星姿勢計

せいしせいけい
star tracker
Word

増勢

ぞうせい
increasing trend
Word

多勢に無勢

exp
たぜいにぶぜい
to be outnumbered (i.e. in a military context)