sleepless

the word 'sleepless' is a transparent english compound formed from two native germanic elements. its first element, 'sleep', descends from the old english noun 'slæp', which is rooted in the proto-germanic 'slēpaz', itself from the proto-indo-European base 'sleb-', meaning "to be weak, sleep." the second element, the suffix '-less', originates from the old english adjective '-lēas', meaning "devoid of, free from," which is related to the verb 'to lose'. the combination is perfectly logical, creating an adjective that literally means "devoid of sleep" or "without sleep," directly describing a state of insomnia or vigilance. this straightforward morphological process exemplifies how english readily creates descriptive adjectives by attaching the privative suffix '-less' to a noun.

Structure: sleep (rest) + less (without) sleep (from old english 'slæp', meaning "sleep, a state of rest") + less (from old english '-lēas', an adjective-forming suffix meaning "free from, without, lacking")