adj .
inactive ; sluggish ; not reacting chemically 활동적이지 못한 ; 게으른 ; 화학적 반응이 없는

• The baseball team seemed strangely inert ; it was as though they had lost the will not only to win but also even to play.
• Having colds made the children inert and reluctant to get out of bed.
  감기 때문에 아이들은 기운이 없어서인지 침대 밖으로 나오려 하지 않았다.
• Helium is an inert gas : it doesn't burn, it doesn't explode, and it doesn't kill you if you inhale it.
  헬륨은 비활성 기체이다 : 타지도않고 폭발하지도 않으며 들이마신다고 해도 사람을 죽일 만큼 치명적이지 않다.
• To be inert is to be characterized by inertia. As it is most commonly used, inertia means lack of get-up-and-go, or an inability or unwillingness to move.
• In physics, inertia refers to an object's tendency to continue doing what it's doing (either moving or staying still) unless it's acted on by something else.