somnolent
Concise Oxford English Dictionary © 2008 Oxford University Press:
somnolent /ˈsɒmnəl(ə)nt/
▶adjective sleepy; drowsy.
■ inducing drowsiness.
– derivatives
somnolence noun,
somnolency noun,
somnolently adverb.
somnolence noun,
somnolency noun,
somnolently adverb.
– origin ME: from OFr. sompnolent or L. somnolentus, from somnus ‘sleep’.
'somnolent' also found in these Oxford entries:

