The word "weightlessness" is a modern English compound built from native Germanic elements. Its core, "weight," traces back to the Old English "gewiht," related to the concept of lifting or carrying, and ultimately to the Proto-Indo-European root weǵh- meaning "to go, transport." The suffix "-less," from Old English "-lēas," originally meant "free from" or "devoid of," and is used to negate the noun it follows. Finally, the abstract noun suffix "-ness" is added to form a term describing the specific condition. Thus, the literal construction "the state (-ness) of being without (-less) weight" perfectly captures the physical phenomenon experienced when gravitational forces are counteracted, as in orbital flight.

Structure: weight (heaviness) + less (without) + ness (state or quality) - weight: From Old English 'wiht', 'gewiht', meaning "a measure of weight, heaviness." It functions as the core noun denoting the force due to gravity. - less: From Old English '-lēas', meaning "devoid of, free from." It functions as an adjective-forming suffix indicating absence. - ness: From Old English '-nes', '-nis', a noun-forming suffix used to create abstract nouns indicating a state, condition, or quality.