pent-up resentment; grudges and hard feelings
being resented (by someone one holds resentment towards); thinking ill of a person based on a misunderstanding; unjustified resentment caused by a misunderstanding; responding to kindness with resentment
song with lyrics about resentment and a sorrowful tune; resentful complaint
hard feelings; (mutual) resentment
excessive envy (of somebody in much the same position as oneself); (lit.) envy of a leper's pockmarks