rankles

/R AE1 NG K AH0 L Z/
verb
  1. 1

    To cause irritation or deep bitterness.

  2. 2

    To fester.

    โ€œa splinter rankles in the fleshโ€

Source: https://en.wiktionary.org/wiki/rankle, https://en.wiktionary.org/wiki/rankles