intransitive for reflexive. To become corrupt, decay.

intransitive. To become corrupt or putrid, to ‘go bad’; to undergo decomposition; to putrefy, rot, decay.

intransitive. To form an ulcer; to break out into ulcers or purulent sores; to fester.

To fester, esp. to a degree that causes pain; to putrefy, rot. Also (esp. in later use) in figurative… intransitive. Of a thing. Obsolete.

intransitive. To grow or become bad or depraved; to suffer corruption. Obsolete. rare.