renege

verb3

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

   • 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. — 2011
2. •
   To break one's commitment to follow suit when capable.
3. •
   (no longer used) 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. — 1606