The compound 'throw-away' is a modern English formation from the phrasal verb 'to throw away', meaning to discard. The literal sense of physically propelling something from oneself into a state of disuse evolved into an attributive adjective and noun describing items designed for such a single-use, disposable purpose. This reflects a cultural and economic shift towards mass-produced, low-cost consumer goods. By extension, the term also applies to remarks delivered with the same casual lack of consideration as one would give to discarding a worthless object.

Structure: throw (to propel) + away (from a place) 'throw' is from Old English 'þrāwan' (to twist, turn), of Germanic origin. In this compound, it functions as a verb meaning to propel or cast. 'away' is from Old English 'aweg', 'onweg' (on one's way), of Germanic origin. It functions as an adverb meaning from a place or into a state of discard.