Declare invalid:
— The contract was annulled.

synonyms: avoid, invalidate, nullify, quash, void.

Dutch: casseren, oblitereren, vernietigen

Cancel officially.

synonyms: countermand, lift, overturn, repeal, rescind, reverse, revoke, vacate.

Roget 756: abrogate, annul, cancel; destroy etc. 162; abolish; revoke, repeal, rescind, reverse, retract, recall; abolitionize^†; overrule, override; set aside; disannul, dissolve, quash, nullify, declare null and void; disestablish, disendow^†; deconsecrate.    disclaim etc. (deny) 536; ignore, repudiate; recant etc. 607; divest oneself, break off.    countermand, counter order; do away with; sweep away, brush away; throw overboard, throw to the dogs; scatter to the winds, cast behind.    dismiss, discard; cast off, turn off, cast out, cast adrift, cast out of doors, cast aside, cast away; send off, send away, send packing, send about one's business; discharge, get rid of etc. (eject) 297; bounce [U.S.]; fire [Slang], fire out [Slang]; sack [Slang].    cashier; break; oust; unseat, unsaddle; unthrone^†, dethrone, disenthrone^†; depose, uncrown^†; unfrock, strike off the roll; disbar, disbench^†.    be abrogated &c.; receive its quietus; walk the plank.    ... show more

Dutch: herroepen, afschaffen, annuleren, intrekken, terugtrekken, achteruitzetten, terugdraaien