Antonyms of pressure:
comfort, consolation, agreement, approval, consent, permission, convincing, persuasion, reason, suasion.
Examples of usage:
  1. Was the pressure returned?
    "David Elginbrod", George MacDonald.
  2. But at Eliza's age a good- looking girl does not feel that pressure; she feels free to pick and choose.
    "Pygmalion", George Bernard Shaw.
  3. Both feared that Evelyn regarded him in the same light, and it accordingly became evident that a little pressure might be required.
    "Vane of the Timberlands", Harold Bindloss.