supersharp

Example:The blade was blunt, and he struggled to cut through the metal.

Definition:Flat at an edge or end; not sharp; dull; as, a blunt knife.

Example:The lesson was delivered by a dull teacher, which made students uninterested.

Definition:Not sharp or keen in point or edge; slow to learn or perceive; wanting keenness, acuteness, or penetration; uncommunicative; torpid; sluggish; stupid.

Example:His comments were imprecise, making it hard for others to understand his intended message.

Definition:Lacking sharpness; not definite, specific, or distinct.