IPA: /ˈfiːbrəl/
KK: /ˈfɛbrəl/
Relating to or having a fever; feeling hot and sick.
The patient was in a febrile state, showing signs of high temperature and discomfort.
Febrile → It is derived from "febris" (meaning fever) in Latin. The word "febrile" refers to a condition characterized by fever or fever-like symptoms.
Think of 'febris' which means fever, and remember that 'febrile' describes something related to having a fever.