booster

増強装置、支援者

物事の働きをよくしたり、力を強めたりする人や物。

やさしい英語で： A person or thing that helps something work better or become stronger.

• The win was a confidence booster.
• We bought a signal booster for the house.
• Local boosters helped raise money for the club.

類義語： supporter, enhancer

よく使う表現： confidence booster, signal booster, morale booster

追加接種

病気への予防効果を保つために追加で受けるワクチン。

やさしい英語で： An extra vaccine dose that helps keep you protected against a disease.

• I had a booster yesterday.
• The clinic offers tetanus boosters.
• When did you get your last booster?

類義語： booster dose, booster shot

よく使う表現： booster dose, tetanus booster, get a booster

補助ロケット、ブースター

宇宙船の上昇やミサイルの飛距離を助けるため、追加の推力を出すロケット。

やさしい英語で： A rocket that supplies extra force to help a spacecraft rise or a missile travel farther.

• The booster lifted the rocket.
• Two boosters separated shortly after launch.
• Engineers tested the missile's new booster.

類義語： booster rocket

よく使う表現： rocket booster, solid-fuel booster, booster rocket

泥棒、万引き犯

物を盗む人。特に店から商品を盗む人。

やさしい英語で： A person who steals things, especially from shops.

• The guard caught a booster.
• Two boosters had stolen clothes from the shop.
• Police questioned the booster about the missing goods.

類義語： thief, shoplifter

よく使う表現： catch a booster, booster stole something