past participle (accusative singular masculine) of a contracted/compound adjective; looks like a scribal fusion or very rare hapax. Likely resolves to ni-maṁsa-lohita-makkhita or similar (attested: makkhita 'smeared, covered')
Analysis. A compound of ni- (down, into) + maṁsa (flesh) + lohita (blood, from √ruh 'redden') + makkhita (smeared, covered). The contraction suggests a single vivid epithet for something grotesquely or nauseously flesh-and-blood-covered, used in descriptions of decay or the visceral body.
Meanings from the Digital Pāḷi Dictionary; morphology and etymology by Claude.
Lite mode — plain HTML for e-readers and old browsers. Full version