child-proof (adj.)youdaoicibaDictYouDict[child-proof 词源字典]
1933, from child (n.) + proof (n.). As a verb by 1951.[child-proof etymology, child-proof origin, 英语词源]
fool-proof (adj.)youdaoicibaDictYouDict
also foolproof, 1902, American English, "safe against the incompetence of a fool," from fool (n.1) + adjectival sense from proof (n.).
sound-proof (adj.)youdaoicibaDictYouDict
1853, from sound (n.1) + proof (n.).
gas-proof (1)youdaoicibaDictYouDict
"Impermeable to (especially poisonous) gas; gas-tight", Mid 19th cent.; earliest use found in Boston Daily Atlas. From gas + proof.
gas-proof (2)youdaoicibaDictYouDict
"To make (an enclosure, material, etc.) gas-proof", Mid 19th cent. From gas-proof.
cold-proofyoudaoicibaDictYouDict
"Offering resistance against cold", Early 19th cent..