verb
1.
Synonyms: annul 4, discharge, dissolve, quash, vacate, void
Related Word: abate, extinguish
Contrasted words: establish, found; confirm, ratify
Antonyms: institute ( as by enacting or decreeing )
2.
Synonyms: abolish 1, abate, annihilate, annul, invalidate, negate, nullify, quash, undo, vitiate
Related Word: extinguish; blot out, cancel, obliterate; ruin, wreck
Contrasted words: support, uphold
Antonyms: establish, fix ( as a right, a quality, or a custom )