Klein Dictionary, ימר

ימר to boast, exalt oneself.
    — Hith. - הִתְיַמֵּר he boasted, exalted himself (a hapax legomenon in the Bible, occurring Is. 61:6 in the form תִּתְיַמָּרוּ). [A secondary form of אמר ᴵᴵ.] Derivatives: יָמְרָה, הִתְיַמְּרוּת.