Reproduzir palavra 勢い余る 勢い余る いきおいあまる to have excess momentum (from going too fast, using too much force, etc.)
Reproduzir palavra 勢力拮抗 勢力拮抗 せいりょくきっこう struggle for supremacy between evenly-matched forces (parties)
Reproduzir palavra 破竹の勢い 破竹の勢い はちくのいきおい (with) great vigour (from the way splitting bamboo goes all down the stick)