give someone a shot in the arm (givu samuwan a shot in za āmu)

Idiom Medicine

意味

to boost someone’s confidence or enthusiasm

誰かの自信や熱意を高める (dareka no jishin ya netsui o takameru)

例文

"The victory gave the team a shot in the arm before the final."

"この勝利は決勝前にチームに活力を与えた。" (kono shōri wa kesshō mae ni chīmu ni katsuryoku o ataeta.)