IPA: /ˈɪnərˌsoʊl/
KK: /ˈɪnərˌsoʊl/
A soft layer inside a shoe that provides comfort and support for the foot.
I replaced the innersole of my shoes to make them more comfortable.
Innersole → The word is formed from "inner" (from Old English "innera", meaning situated within) and "sole" (from Latin "sola", meaning the bottom part of a shoe). The term "innersole" refers to the part of a shoe that is situated within, providing comfort and support.
Think of something that is 'situated within' ('inner') the 'bottom part of a shoe' ('sole') — that's what an innersole is.