proof (adj.) Copy link • proof (adj.): expr. by verb: p. against argument, *quem nulla argumenta movere possunt: p. against corruption, *qui nullo pretio labefactari potest, cf. Cic. Clu. 68, 194: intrepidity p. against all terrors, *animi praesentia quam nulli metus frangere neque debilitare possunt: v. to prevail on; shake, overcome, etc.