vouch

v. 担保,保证,证明,确定

voluble, volubly, volume, voluminous, voluntarily, voluntary, volunteer, voluptuous, Volvo, vomit, voracious, voracity, votary, vote, vote down, vote in, vote through, voter, voting, votive, voucher, vouchsafe, vow, vowel, vox populi, voyage, voyager, voyeur, voyeurism, voyeuristic, VP, vs, VSO, VTOL, vulcanite, vulcanization, vulcanisation, vulcanize, vulcanise, vulgar, vulgar fraction (also simple fraction), vulgarism,