renege

Etymology

Borrowed from Latin renegō, from negō (“I deny”). Possibly influenced by renegotiate. Doublet of renay. See also renegade.

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 […] 2010, Dolly Freed, Possum Living, page 149
   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. February 5, 2011, Michael Kevin Darling, “Tottenham 2 - 1 Bolton”, in BBC
2. (intransitive) In a card game, to break one's commitment to follow suit when capable.
3. (transitive, archaic) To deny; to renounce
   All Europe high (all sorts of rights reneged) / Against the truth and thee unholy leagued. 1608, Josuah Sylvester, The Sepmaines of Du Bartas