Postpone

Antonyms of postpone:
abbreviate, conclude, curtail, hurry, reduce, abridge, contract, hasten, limit, shorten, act, deal, decide, do, work.
Examples of usage:
  1. She begged him to postpone this terrible journey across the seas.
    "Stories of Birds", Lenore Elizabeth Mulets.
  2. " Perhaps," said Mr. Morton quietly, " it will be better to postpone inquiries until your son has changed his clothes."
    "Frank's Campaign or the Farm and the Camp", Horatio Alger, Jr..
  3. But she is not, and you may as well postpone the lesson I suppose you want to give her.
    "The Squirrel Inn", Frank R. Stockton.