prove: [12] The ultimate source of prove was Latin probus ‘good’. This went back (like the related Sanskrit prabhu- ‘eminent, mighty’) to a prehistoric Indo-European compound *probhwo- ‘being in front’, hence ‘excelling’ (*promeant ‘in front’, and *bhwo- was the ancestor of English be). From it was derived the verb probāre ‘test, approve, prove’, which has given English approve, probable, probe, proof, reprobate, reprove, and of course prove, acquired via Old French prover. Another Latin derivative of probus was probitās ‘honesty’, from which English gets probity [16]. => approve, probable, probe, proof, reprobate
prove (v.)
late 12c., pruven, proven "to try, test; evaluate; demonstrate," from Old French prover, pruver "show; convince; put to the test" (11c., Modern French prouver), from Latin probare "to make good; esteem, represent as good; make credible, show, demonstrate; test, inspect; judge by trial" (source also of Spanish probar, Italian probare), from probus "worthy, good, upright, virtuous," from PIE *pro-bhwo- "being in front," from *pro-, extended form of root *per- (1) "forward, through" (see per), + root *bhu- "to be" (cognates: Latin fui "I have been," futurus "about to be;" Old English beon "to be;" see be). Related: Proved; proven; proving.
例文
1. I have to prove myself as a respectable，balanced，person.
私は自分がまじめで穏やかな人であることを証明しなければなりません。
2.If they prove ineffective they should be demoted or asked to retire.
彼らが適任でないことが事実で証明されれば、彼らを降格させるか退職させるべきだ。
3.There is the strong possibility that such cooperation will prove unworkable.
このような協力は通用しない可能性が高い。
4. They must prove they own ￡250,000 of realisable assets.
彼らは25万ポンドの現金化可能な財産を持っていることを証明しなければならない。
5.The research should prove invaluable in the study of linguistics.