Origin of asleep
Related Words for half asleeplethargic, dazed, comatose, dreamy, drugged, heavy, indolent, lackadaisical, languid, lazy, restful, sluggish, somnolent, soothing, soporific, tired, torpid, nodding, slumberous, dopy
c.1200, aslepe, o slæpe, from Old English on slæpe (see sleep). The parallel form on sleep continued until c.1550. Of limbs, "numb through stoppage of circulation," from late 14c. Meaning "inattentive, off guard" is from mid-14c.
In addition to the idiom beginning with asleep
- asleep at the switch
- fall asleep