rottingness
Something which is undergoing rot or decomposition.
rare, uncountable
He sent women down to the beach to collect the guttings and debris left there, the rottingness of fish which stank so badly, the unsaltable entrails of cod and plaice and porpoise in wooden buckets.
Where it comes from
From Middle English rotyngnesse; equivalent to rotting + -ness.
Adapted from the Wiktionary entry rottingness (CC BY-SA 4.0).