insole

American  

[in-sohl] / ˈɪnˌsoʊl /

noun

insoles plural

1. the inner sole of a shoe or boot.

2. a thickness of material laid as an inner sole within a shoe, especially for comfort.

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insole British  

/ ˈɪnˌsəʊl /

noun

1. the inner sole of a shoe or boot

2. a loose additional inner sole used to give extra warmth, comfort, etc

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Other Word Forms

Noun Inflected Forms

• insoles
  plural

Etymology

Origin of insole

First recorded in 1850–55; in + sole ²

Example Sentences

Yet as I wrangled them into my closet, something kept nagging at me like a pebble in an insole: Bernie Sanders’ eye-rolling dismissal outside the Senate elevator.

From Slate • Jun. 5, 2026

There were fears he would never play tennis again but, on the suggestion of Maceira, Nadal used a specialist insole to continue competing.

From BBC • May 29, 2026

In a sneaker insole, an auxetic gel or rubber foam might better cushion the foot when it strikes the ground.

From Science Daily • Jun. 4, 2024

Each pair also gets a custom insole, extra protection for the one foot he broke in high school and the other foot he broke as a freshman at UCLA.

From Los Angeles Times • Dec. 16, 2022

I didn’t carry incriminating evidence around under the insole of my right shoe.

From "Glitch" by Laura Martin