IPA: /ˈkrʌstləs/
KK: /ˈkrʌstləs/
Describing something that does not have a crust, often used for food items like sandwiches or pies.
I prefer crustless sandwiches for my lunch.
Crustless → It is formed from "crust" (from Old French *croûte*, meaning a hard outer layer) and "-less" (meaning without). The word "crustless" means without a crust or hard outer layer.
Think of something that is 'without' ('-less') a 'hard outer layer' ('crust') — that's what crustless means.