brights

Example:He seemed quite dull in the meeting and was unable to follow the discussions.

Definition:Lacking mental sharpness or alertness.

Example:No one would describe him as stupid; he's just not very interested in learning.

Definition:Having or showing a low degree of mental awareness, perception, or comprehension; lacking intelligence.

Example:Neither the cut nor the shock dulled his sense of purpose and resolution.

Definition:Having less mental sharpness, as from use or a blow.