slumbery
1. [ adjective ] inclined to or marked by drowsiness
Synonyms: slumbrous somnolent slumberous
Examples:

"slumberous (or slumbrous) eyes" "`slumbery' is archaic" "the sound had a somnolent effect"

Related terms: asleep
Similar spelling:   slumber
  slumberer
  slumberous
  slumbering
  slumped