# infirm vs infra

> English confusable word pair

## The two words

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

### infra
*adverb · IPA /ˈɪn.fɹə/ · frequency rank #32,864*
Discussed later.

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