決起集会で参加者たちは大いに気勢を上げた。
At the rally, the participants were in high spirits and fired each other up.
開始早々の失点で、チームは気勢をそがれてしまった。
Conceding a goal right at the start took the wind out of the team's sails.
何度反対されても、彼の気勢は少しも衰えなかった。
No matter how often he was opposed, his spirit never flagged.