heartburning

noun

1. Secret enmity; discontent.

   “[N]ecessity may abolish any law, but cannot alter the sentiments of the vulgar; right of inheritance being perhaps the most popular of all topicks; and therefore in great changes, when that is broke, there will remain much heart-burning and discontent among the meaner people; which (under a weak prince and corrupt administration) may have the worst consequences upon the peace of any state.”

   “[John] Winthrop, acting with the concurrence of Wilson, whom the delicacy of his position compelled to reserve, with difficulty succeeded in parrying the blow. But the transaction did not fail to leave heart-burnings.”

   “Such speeds are called for on a schedule of this sort, and the unconventional appearance was justified and necessary; but it caused many heartburnings, particularly amongst the older generation, from an aesthetic point of view.”

2. Heartburn.

   “Hee sett Promethius, on a merrye pynn, / Whoe dranke soe devillishly, that there he gott / A terrible heartburninge, […]”