IPA: /ˈɪnərˌsprɪŋ/
KK: /ˈɪnərˌsprɪŋ/
Referring to a type of mattress or cushion that contains many coil springs inside a padded cover, providing support and comfort.
I bought an innerspring mattress for better back support while sleeping.
Innerspring → The word is formed from "inner" (from Old English "innera", meaning situated within) and "spring" (from Old English "springan", meaning to leap or burst forth). The term "innerspring" refers to a spring mechanism located within an object, typically used in mattresses or other cushioning products.
Think of something that is 'situated within' ('inner') and 'leaps' or 'bursts forth' ('spring') — that's how an innerspring works, providing support from within.