retract, abjure, forswear, withdraw, take back, retractate, unassert, renay, repudiate, recuse, more...

affirm, confirm, validate

repudiate, retract, revoke, rescind, withdraw, more...

less, last, first, wise, many, daily, original

change my mind,   retract a statement,   back out of,   change their minds,   to turn back on,   go to canossa,   change one's story,   change my opinion