drowsy

Inclined to drowse; heavy with sleepiness

I was feeling drowsy and so decided to make a cup of coffee to try to wake myself up.

Causing someone to fall sleep or feel sleepy; lulling; soporific.

It was a warm, drowsy summer afternoon.

drowsy medicine

Boring.

The narrative throughout holds the reader; it Is not a drowsy book.

Dull; stupid.

... the hoofbeats of the mule made a sound as drowsy as a fly's buzz on a summer afternoon.