slumberous

Adjective

• inclined to or marked by drowsiness
  • slumberous (or slumbrous) eyes
    
  • `slumbery' is archaic
    
  • the sound had a somnolent effect
    

• quiet and tranquil
  • a slumberous June morning
    

Related words

• Synonyms: 
  slumbery , slumbrous , somnolent