BDB2881 [H2556]

III. [חמץ] verb be ruthless (dubious √; perhaps by-form of חמס; perhaps erroneous for it; identification by most with I. חמץ, be sour, hence sharp, violent, but connection improbable) — only Qal Participle active מִכַּף מְעַוֵּל וְחוֺמֵץ Ps 71:4 from the hand of the unjust and ruthless (|| מִיַּד רָשָׁע).

The Brown-Driver-Briggs Hebrew and English Lexicon
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