Why this word is great
NIDDERING — [Adjective] Cowardly, dastardly, or notoriously evil or wicked; infamous. A variant of 'nithing', resulting from the letter eth (ð) in Early Middle English 'niðing' being mistaken for a 'd' followed by a mark of suspension, leading to the erroneous spelling 'nidering' in early printed works, later popularized by Sir Walter Scott. Unlike 'craven' (which cowers in pure fear) or 'dastardly' (which slinks in treachery), niddering is the gutless malice of the backstabber who flees his own crime, the petty tyrant who bullies the weak but trembles before equals, the coward whose very name curdles in the throat of history. It is the stench of unearned power, the chill of a shadow that vanishes when confronted—proof that some evils are not bold, but small, and thus all the harder to root out.