# infirm vs inform

> English confusable word pair

## The two words

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

### inform
*verb · IPA /ɪnˈfɔɹm/ · frequency rank #5,603*
To instruct, train (usually in matters of knowledge).

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