verb
1.
Synonyms: annul 4, abrogate, discharge, dissolve, vacate, void
2.
Synonyms: abolish 1, abate, abrogate, annihilate, annul, invalidate, negate, nullify, undo, vitiate
3.
Synonyms: crush 5, annihilate, extinguish, put down, quell, quench, squash, suppress