All impetus antonyms

noun impetus

• inertia — inertness, especially with regard to effort, motion, action, and the like; inactivity; sluggishness.
• hindrance — an impeding, stopping, preventing, or the like.
• block — A block of flats or offices is a large building containing them.
• discouragement — an act or instance of discouraging.
• check — Check is also a noun.