fast

速い

短い時間で動いたり何かをしたりできる。

やさしい英語で： Able to move or do something in a short time.

• This is a fast train.
• We need a faster internet connection.
• Is your new computer fast enough?

類義語： quick, rapid, speedy

反対語： slow

よく使う表現： a fast car, fast internet, a fast runner, fast trains

忠実な、親しい

特に友人として、親しく変わらず相手に尽くす。

やさしい英語で： Remaining close and loyal to someone, especially as a friend.

• They soon became fast friends.
• She remained his fast friend throughout the difficult years.
• The two neighbors have been fast friends since childhood.

類義語： loyal, faithful, steadfast

よく使う表現： fast friends, a fast friend

断食

宗教や健康などの理由で、自ら食べずに過ごす期間。

やさしい英語で： A period when someone chooses not to eat, often for religious or health reasons.

• Her fast lasted one day.
• They broke their fast at sunset.
• The test requires an overnight fast.

よく使う表現： break a fast, a religious fast, an overnight fast

速く、素早く

高い速度で、または短い時間で。

やさしい英語で： At a high speed or in a short time.

• He runs very fast.
• You drove too fast on that narrow road.
• How fast can you type?

類義語： quickly, rapidly

反対語： slowly

よく使う表現： run fast, work fast, too fast

しっかりと、固く

動いたり緩んだりしないほど固く、確実に。

やさしい英語で： Firmly or securely, so that someone or something cannot move or come loose.

• Hold fast to the rope.
• The boat was stuck fast in the mud.
• She tied the gate fast before the storm.

類義語： firmly, securely, tightly

反対語： loosely

よく使う表現： hold fast, stuck fast, tied fast

断食する

宗教や健康などの理由で、一定期間自ら食べない。

やさしい英語で： To choose not to eat for a period, often for religious or health reasons.

• They fast during Ramadan.
• I fasted before my blood test.
• How long do you need to fast?

使い方： fast for a period (She fasted for twelve hours before the test.); fast during something (Many Muslims fast during Ramadan.)

よく使う表現： fast for something, fast during ramadan, fast before something

絶食させる

人や動物に一定期間食べ物を与えず、食べないようにさせる。

やさしい英語で： To make a person or animal go without food for a period.

• The vet fasted the dog overnight.
• The team fasted the animals before the procedure.
• Patients were fasted for several hours before surgery.

よく使う表現： fast an animal, fast a patient