dolorifuge
/ˌdɒləˈrɪfʊdʒ/ or /ˌdoʊləˈrɪfʊdʒ/Definitions
1. noun
A person who avoids or flees from pain or unpleasantness, often in a cowardly manner.
“Her reputation as a dolorifuge was tarnished when she abandoned her ailing mother in time of need.”