nonfeasor
/ˈnɒnfɪzər/Definitions
1. noun
A person who fails or refuses to perform a duty or take action.
“The government official was criticized for being a nonfeasor in the face of the growing crisis.”
2. noun
A person who has the opportunity to act but fails to do so.
“The nonfeasor’s inaction led to the company’s financial downfall.”