IPA: /ˈswɪməbl/
KK: /ˈswɪməbl/
Able to be used for swimming or suitable for swimming in.
The lake is clean and swimmable during the summer months.
Comparative: more swimmable
Superlative: most swimmable
Swimmable → It is formed from "swim" (from Old English *swimman*, meaning to move through water) and "-able" (meaning capable of). The word "swimmable" means capable of being swum in or suitable for swimming.
Think of the Old English word for moving through water — that's what makes something "swimmable"; it means you can swim in it.