thwart Synonyms

frustrate foil cross scotch queer spoil bilk baffle short circuit scuttle undercut squashing squelching stay ruin retard obstruct obviate oppose outdare overthwart plowwright preclude prevent resist restrain restrict stick stop foul up close off set back pre-empt hold up stymie stonewall cancel out nip in the bud snooker stave off neutralise stultify thwarter thwartly transverse transversely trump untune vertically hold back