IPA: /ˈkrʌsti/
KK: /ˈkrʌsti/
Having a hard outer layer or surface, often rough or tough; can also describe someone who is unfriendly or gruff in manner.
The bread was crusty on the outside but soft inside.
Crusty → The word is derived from "crust" (from Old French *croûte*, meaning a hard outer layer) and the suffix "-y" (meaning characterized by). Thus, "crusty" describes something characterized by having a hard outer layer.
Think of something that has a hard outer layer, like a crust on bread, to remember that "crusty" means having a crust.