adjective

muzzy

MUZ-ee/ˈmʌzi/

Foggy or confused in mind or perception.

My head feels muzzy after a night of broken sleep.

A groggy young man at breakfast tries to pour coffee into an upside-down mug, staring at the small spill with heavy eyelids and a bewildered expression.

Etymology

The origin is uncertain: muzzy may come from mossy or dialectal mosey. The latter already meant “hazy” or “stupefied with drink,” closely matching the word’s confused, mentally blurred sense.

More examples

I am still too muzzy to follow the instructions.
The fever leaves her with muzzy thoughts.
His memories of the evening are muzzy.

Forms

muzzy · muzzier · muzziest

muzziness noun — A foggy or confused mental state.

Similar words

foggy: Suggests difficulty thinking clearly without necessarily feeling physically drowsy.
groggy: Emphasizes drowsiness and unsteadiness, especially after sleep or anesthesia.
confused: Emphasizes difficulty understanding rather than a sleepy or dulled feeling.