Upper-Intermediate (B2)
IPA: /ˌɛksoʊˈθɜrmɪk/
KK: /ɛkˈsoʊθɜrmɪk/
Definition
Describing a process or reaction that releases heat into its surroundings.
Example
The burning of wood is an exothermic reaction that produces heat and light.
Conversation

Did you know that some chemical reactions are exothermic?

Yeah, I heard they release heat while happening.

It's interesting how much energy they can produce.

Definitely! It’s like nature's way of warming things up.
Synonyms & Antonyms
Synonyms
heat-releasing
thermal
calorific
Antonyms
endothermic
cooling
chilling
Root Explanation
Exothermic → It is formed from "exo-" (meaning outside) and "thermē" (meaning heat). The word describes a process that releases heat to the outside environment.
Memory Tip
Think of a process that releases heat 'outside' ('exo-') — that's why exothermic means producing heat outward.
Visually Confused Words
geothermic
endothermic
euthermic
thermic
etheric
paleothermic
myothermic
miothermic