1. ((informal) stupid, slow witted or dull) stupid
   - blockheaded, boneheaded, duncical, duncish, fatheaded, loggerheaded, thick, thick-skulled, wooden-headed, birdbrained, thick-witted

See also: stupid

• imposing
• imposingly
• imposition
• impossibility
• impossible
• impossible action
• impossibleness
• impossibly
• impost
• imposter
• impostor
• imposture
• impotence
• impotency
• impotent
• impotently
• impound
• impounding
• impoundment
• impoverish
• impoverished
• impoverishment
• impracticability
• impracticable
• impracticableness