IPA: /ˈbiːstli/
KK: /ˈbistli/
Something that is like a wild animal or very unpleasant.
The beastly weather made it hard to go outside.
In a very extreme or intense manner.
The weather was beastly hot during the summer.
Beastly → It is formed from "beast" (from Old French *beste*, meaning a wild animal) and "-ly" (meaning in the manner of). The word "beastly" describes something that is in the manner of a beast, often implying savagery or brutality.
Think of the word 'beast' to remember that 'beastly' means behaving like a wild animal, often in a savage way.