# infill vs infirm

> English confusable word pair

## The two words

### infill
*verb · frequency rank #48,290*
To fill in a space, hole or gap.

### infirm
*adjective · IPA /ɪnˈfɜːm/ · frequency rank #46,546*
Weak or ill, not in good health.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/vs/infill-vs-infirm