Manevolent

/məˈnev.əl.ənt/

Adjective: Describes a Jeckyll and Hyde like character¹ - a person who is apt to change from a good person to an evil person (combination of benevolent and malevolent).

Dr Jeckyll is manevolent, as he shifts quickly from caring² doctor to evil and violent murderer Mr Hyde.

Footnotes

1. like charater后置定语修饰 a Jeckyll and Hyde ↩

2. kind, helpful and showing that you care about other people; He’s a very caring person. ↩