1. いきおい(勢い)
  1. 1〔威力〕authority;〔勢力〕power, influence
    • 威勢を誇示する
    • make a show of one's power
  1. 2〔元気〕spirits

    威勢よく in high spirits

    • 威勢のよい青年
    • a high-spirited [dashing] young man
    • 威勢をつけて出掛けた
    • We plucked up our spirits and set out.
    • 威勢のいいことを言っているが内心びくびくだ
    • He is really quaking inside in spite of his big talk.
    • 彼らの威勢に圧倒された
    • I was overwhelmed by their forcefulness [energy].