Nefarious and Self-willed

Nefarious adjective - Not conforming to a high moral standard; morally unacceptable.

Self-willed and nefarious are semantically related In some cases you can use "Self-willed" instead an adjective "Nefarious".

Self-willed adjective - Sticking to an opinion, purpose, or course of action in spite of reason, arguments, or persuasion.

Nefarious and self-willed are semantically related in mean topic. Sometimes you can use "Nefarious" instead an adjective phrase "Self-willed".