Intermediate (B1)
IPA: /dɪˈfɜː.və.səns/
KK: /dɪˈfɜrvəsəns/
Definition
The process of a fever decreasing or going away, often shown by a drop in body temperature.
Example
After taking the medicine, her defervescence was noticeable as her temperature returned to normal.
Conversation

I heard you were sick last week; how are you feeling now?

Much better, thanks! I finally reached a point of defervescence after being in bed for days.

That’s great to hear! It must feel like a relief to no longer have a fever.

Definitely! I’m just glad to be back to my normal self.
Synonyms & Antonyms
Synonyms
abatement
subsidence
reduction
Antonyms
increase
aggravation
escalation
Root Explanation
Defervescence is formed from "de-" (meaning down or away) and "fervere" (meaning to boil or bubble). The term describes the process of a fever subsiding or cooling down, akin to the boiling of a liquid decreasing.
Memory Tip
Think of something 'cooling down' ('de-') from a 'boiling' state ('fervere') — that's what defervescence means.
Visually Confused Words
effervescence
fervescence
ineffervescence
effervescency
deflorescence
decrescence
degenerescence
effervescent