renege

verb

1. (intransitive)To break a promise or commitment; to go back on one's word.

   “Previously I promised not to proselytize miserism, but now I want to renege a little on that promise. If your family income is anywhere near average, you can scrimp and save and cut back for maybe two to four years […]”

   “Clattenburg awarded Spurs a penalty for the third time after a handball in the area but he reneged after realising that the linesman had flagged Crouch offside in the build-up.”

2. (intransitive)To break one's commitment to follow suit when capable.
3. (archaic, transitive)To deny; to renounce

   “His captaines heart, / Which in the ſcuffles of great fights hath burſt / The Buckles on his breaſt, reneages all temper, / And is become the bellowes and the Fan / To coole a Gypſies Luſt.”

   “All Europe high (all sorts of rights reneged) / Against the truth and thee unholy leagued.”