Definitions

1. adjective

causing or tending to cause disease or decay

“The morbific conditions in the abandoned factory posed a significant health risk to anyone who entered.”

2. noun

a cause or agent of disease or decay

“Morbific agents in the water supply were the likely cause of the outbreak.”

3. verb

to cause disease or decay

“The damp environment began to morbific the structure, causing it to crumble.”