Which of the following words is closest in meaning to “Inertia”?

Inertia means inactivity; resistance to change or movement.

• Correct answer - sluggishness: it has the same meaning as Inertia.
• exhaustion: extreme tiredness - wrong, it does not mean the same as Inertia.
• agility: ability to move quickly and easily - wrong, it does not mean the same as Inertia.
• infallibility: inability to be wrong - wrong, it does not mean the same as Inertia.