IPA: //ˈwɔːrmər//
KK: /ˈwɔrmər/
Having a higher temperature than something else; more warm.
The weather is warmer today than it was yesterday.
An item or device that provides warmth, often used to keep a person or object warm.
She wore a warmer under her jacket to stay cozy in the cold weather.
Warmer → It is formed from "warm" (from Old English *wearm*, meaning having a moderate degree of heat) and "-er" (meaning a person or thing that performs a specified action). The word "warmer" refers to something that makes or is more warm than another.
Think of something that makes you feel 'more warm' — the '-er' indicates it is a thing that increases warmth.