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Entry 2 senses Webster, 1913

Slumberous

· Slum·ber·ous · IPA
01 a. Inviting slumber; soporiferous.
  1. 1.
    Inviting slumber; soporiferous.
  2. 2.
    Being in the repose of slumber; sleepy; drowsy.
    “His quiet and almost slumberous countenance.” Hawthorne.