somnolent

adjective2

1. •
   Drowsy or sleepy.

   • One minute she was gazing at a mockup of a space capsule, safely surrounded by old, somnolent men; […] — 1966
2. •
   Causing literal or figurative sleepiness.

   • As she reached toward the last few fiddleheads growing on the second hummock, her hand froze. She heard the somnolent buzzing of flies again. — 1999