somnolent

/ˈsɑmnələnt/

If you're somnolent, you're feeling sleepy or drowsy. It's best to avoid operating speedboats or motorcycles when you're somnolent.

Somnolent comes from the Latin word somnolentia, meaning "sleepiness," which in turn is from the Latin root somnus, for "sleep." You can feel somnolent, or describe something as being somnolent. Something described as somnolent is likely to induce sleep, like a boring movie in an overheated theater, or the low, somnolent lighting in a museum exhibit of fragile, old manuscripts.

Definitions of somnolent

1. adjective

   inclined to or marked by drowsiness
   “the sound had a somnolent effect”

   synonyms: slumberous, slumbery, slumbrous

   asleep

   in a state of sleep