the word "tamper-proof" is a modern compound adjective formed from two distinct roots. the first element, "tamper," originates from the latin verb temperare, meaning to mix or regulate, which evolved through middle english to signify meddling or interfering with something. the second element, "proof," derives from the latin probāre, meaning to test or prove, entering english via old french and old english with the sense of demonstrating truth or quality. when combined, "proof" adopts a protective semantic function, common in compounds like "waterproof" or "fireproof," to denote resistance. thus, "tamper-proof" logically signifies something designed to be resistant to the act of unauthorized meddling, blending the concept of interference with that of tested durability.

Structure: tamper + proof tamper: from middle english tamperen, meaning to work in clay, to meddle, likely a variant of temper. origin: latin temperare (to mix, regulate). functional role: verb root indicating interference. proof: from old english prōfian (to test, prove), via old french prove, from latin probāre (to test, prove). functional role: adjective-forming suffix meaning "resistant to, impervious to".