But he's proven time and again that he has a mighty megaphone that can affect the race and is not afraid to use it.
These little round viruses, though, have proven all too hardy and extremely transmissible.
But getting off Italian beachheads at Salerno and Anzio had proven nightmarish.
1650s, past participle adjective from alternative past participle (originally in Scottish legal use) of 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" (cf. Latin fui "I have been," futurus "about to be;" Old English beon "to be;" see be). Related: Proved; proven; proving.