Dozy (adjective)

Sleepy, drowsy, lacking in energy or alertness.

Origin:

The origin of the word dozy is uncertain, but it is believed to have come from the old english word "dohsig" which means "drowsy" or from the middle english word "dowsy" which means "sleepy".

Examples:

1. He felt dozy after a heavy lunch.
2. The dozy cat slept soundly on the windowsill.
3. He was feeling dozy and couldn't focus on his work.
4. She was dozy after her long flight.
5. The dozy driver nearly caused an accident.