the word 'spiritless' is a transparent english compound formed from the native noun 'spirit' and the productive suffix '-less'. the root 'spirit' originates from latin 'spiritus', meaning breath or vital principle, which itself derives from the verb 'spirare' (to breathe). this concept evolved in english to denote animating force, courage, or liveliness. by attaching the old english suffix '-less', meaning without, the compound directly and logically conveys the state of being devoid of energy, courage, or animation.

Structure: spirit (animating force) + less (without) spirit (from latin 'spiritus', meaning breath, soul, courage; functions as the core noun root) + less (from old english '-lēas', meaning devoid of; functions as an adjective-forming suffix denoting absence).