# IDK vs IJ

> English confusable word pair

## The two words

### IDK
*phrase · frequency rank #5,422*
Initialism of I don't know.

### IJ
*name · IPA /eɪ/ · frequency rank #46,535*
A lake (formerly a bay) adjoining the city of Amsterdam, Netherlands.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-03.
Canonical page: https://plainspell.com/en/vs/idk-vs-ij