Usage: 5 forms in 5 verses
Form Translated As     In Verse(s)
μνησικακείτω resent LXX.Zech.7.10
μνησικακείτε have resentment LXX.Joel.3.4
μνησικακεί resents LXX.Prov.21.24
μνησικακήση should resent LXX.Gen.50.15
εμνησικάκησαν resented LXX.Ezek.25.12

Liddell-Scott-Jones

μνησικακέω (mnēsikakeō) to resent G:V

μνησικακέω-έω,

remember past injuries, bear malice, [Refs 5th c.BC+]; especially in party politics, [Refs 5th c.BC+]; μηδὲν or μὴ μ. pass an act of amnesty, [Refs 5th c.BC+] with dative person et genitive _of things_, μ. τινί τινος bear one a grudge for a thing, [LXX+5th c.BC+]

__II μ. τὴν ἡλικίαν cast his age in his teeth, [Refs 5th c.BC+]

LSJ Scripture Refs: LXX.Zech.7.10