caffeine
🇺🇸
/kæˈfiːn/
🇬🇧
/ˈkæfiːn/
a substance found in drinks like coffee and tea that helps you stay awake and alert
Drinking a cup of coffee gives you a caffeine boost to start your day.
커피 한 잔을 마시면 하루를 시작하는 데 카페인 향상을 줍니다.