iznevériti se to fall away, to prove faithless (ali treacherous ali disloyal ali perfidious) to; to become a turncoat (ali renegade ali deserter ali apostate); politika (stranki) to defect, to change sides; (dani besedi) to fail to keep one's word, to go back on one's word; (zapustiti) to desert, to forsake (someone), (dekletu, fantu) to jilt, to betray; (pustiti na cedilu) to fail, to let down, to leave in the lurch
iznevériti se svojim obveznostim to fail in one's obligations
iznevériti se komu v (njegovi) sili to fail someone in his need
iznevériti se možu to betray one's husband
iznevériti se tovarišem pogovorno to rat on one's mates