RhymeZone: nithing definitions

Definitions of nithing:

noun: (archaic) A coward, a dastard; a wretch.
noun: (archaic) A wicked person; also, one who has acted immorally or unlawfully.
adjective: (archaic) Cowardly, dastardly.
adjective: (archaic) Notoriously evil or wicked; infamous.

(Definitions from Wiktionary)