1 : coward. 2 : a person who acts treacherously or underhandedly.

Is Dastard a bad word?

Someone who's dastardly is a scoundrel or a cowardly villain. A superhero might try to protect a city from a dastardly criminal mastermind. Use the adjective dastardly to describe a person or action that's underhanded and mean.

What does it mean to call someone insatiable?

Full Definition of insatiable

: incapable of being satisfied : quenchless had an insatiable desire for wealth.