Synonyms for Forget it:

• adj.

  •trifling (adjective)
  • inconsiderable,
  • Loitering,
  • puny,
  • empty,
  • vain,
  • inconsequential,
  • negligible,
  • petty,
  • minuscule,
  • niggling,
  • dinky,
  • small,
  • hollow,
  • vapid,
  • measly,
  • frivolous,
  • inane,
  • idle,
  • insipid,
  • unimportant,
  • slight,
  • silly,
  • tiny,
  • picayune,
  • banal,
  • valueless,
  • shallow,
  • trivial,
  • jejune,
  • paltry,
  • nugatory,
  • piddling.

• interj.

  •you're welcome (interjection)
  • no problem,
  • it's nothing,
  • no worries,
  • you are welcome,
  • my pleasure.

• v.

  •cancel, revoke (verb)
  • nullify.
  •retract (verb)
  • call off,
  • eat one's words,
  • abjure,
  • disavow,
  • disown,
  • have change of heart,
  • recall,
  • eliminate,
  • deny,
  • back out of,
  • countermand,
  • suspend,
  • rule out,
  • retreat,
  • recede,
  • recant,
  • reel in,
  • fall back,
  • go back on,
  • disclaim,
  • unsay,
  • repudiate,
  • draw in,
  • cancel,
  • revoke,
  • forswear,
  • pull back,
  • sheathe,
  • change one's mind,
  • take in,
  • renounce,
  • back,
  • Retrocede,
  • retrograde,
  • take back,
  • exclude,
  • welsh,
  • pull in,
  • withdraw,
  • back off,
  • back down.
  •take back (verb)
  • reclaim,
  • backpedal,
  • repossess.

• Other synonyms:

  •
  • hush.
  •
  • cheer up.
  •
  • get over.
  •
  • all-right.

Antonyms for Forget it:

• adj.

  • insurmountable
    attainable, possible, surmountable, beatable.
  • trifling
    important, useful, worthwhile, significant.

• adv.

  • never
    always, forever.

• n.

  • negation
    approval, allowance, permission.

• v.

  • nullify
    affirm, sanctify, validate, pass.
  • retract
    corroborate, reaffirm, repeat, emphasize.