mordicancy

Why this word is great

MORDICANCY — [Noun] A biting quality; corrosiveness. From mordicant ("biting, corrosive"), from Latin mordicāns ("biting"), present participle of mordere ("to bite"), + -cy (suffix forming nouns denoting quality or state). Unlike "mordancy" (which sharpens tongues) or "causticity" (which burns through surfaces), mordicancy is the slow, insistent gnaw of something that refuses to let go. It is the vinegar etching its way through a copper penny, the winter wind stripping bark from birch trees, or the quiet erosion of trust between old friends. A quiet violence, patient and inevitable.