slumbery

from WordNet (r) 3.0 (2006)

slumbery
    adj 1: inclined to or marked by drowsiness; "slumberous (or
           slumbrous) eyes"; "`slumbery' is archaic"; "the sound had
           a somnolent effect" [syn: {slumberous}, {slumbery},
           {slumbrous}, {somnolent}]

from The Collaborative International Dictionary of English v.0.48

Slumbery \Slum"ber*y\, a.
   Sleepy. [Obs.] --Chaucer.
   [1913 Webster]