Meanings
suffix-proof (adjective-forming suffix, comparative more -proof, superlative most -proof)
comparative more -proof · superlative most -proof · present singular third person -proofs · participle present -proofing · participle past -proofed · past -proofed
- Added to a noun to form an adjective denoting imperviousness to that noun.
- Added to a noun to form a verb denoting a process to make something impervious to that noun.
Synonyms & antonyms
Also see
Origin
From the adjective proof (“fully resistant”), from the same Old French root as prove.
Full word history & related roots →Translations
Chinese Mandarin 防-
- 防- (fáng)denoting an impervious quality
French résistant à, à l'épreuve de
- résistant àdenoting an impervious quality
- à l'épreuve dedenoting an impervious quality
- imperméable àdenoting an impervious quality
- hermétique àdenoting an impervious quality
- doté d'une sécurité obviant àdenoting an impervious quality
German -fest, -sicher
- -festdenoting an impervious quality
- -sicherdenoting an impervious quality
Hungarian -álló, -biztos
- -állódenoting an impervious quality
- -biztosdenoting an impervious quality
Icelandic -heldur
- -heldurdenoting an impervious quality
Japanese 耐-, 防-
- 耐- (tai)denoting an impervious quality
- 防- (bou)denoting an impervious quality
Malay kalis
- kalisdenoting an impervious quality
Polish odporny
- odpornydenoting an impervious quality
Portuguese anti-, à prova de
- anti-denoting an impervious quality
- à prova dedenoting an impervious quality
Spanish a prueba de
- a prueba dedenoting an impervious quality
Swedish -säker
- -säkerdenoting an impervious quality
Cite this entry
APA
-proof. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/-proof
MLA
“-proof.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/-proof. Accessed November 2, 2026.
Chicago
WatkinsX Dictionary, s.v. “-proof,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/-proof.
Source: -proof on Wiktionary, CC BY-SA 4.0.