IPA: /fɛˈloʊnɪəsli/
KK: /fɛˈloʊnɪəsli/
In a way that relates to or involves a serious crime.
He acted feloniously when he broke into the house.
Feloniously → It is formed from "felon" (from Old French *felon*, meaning a wicked or treacherous person) and the suffix "-iously" (meaning in a manner relating to). The word "feloniously" means in a manner relating to or characteristic of a felon, typically referring to serious crimes.
Think of a 'wicked person' ('felon') acting 'in a manner' ('-iously') that relates to serious wrongdoing. This helps you remember that 'feloniously' describes actions associated with serious crimes.