# deepen vs deepest

> English confusable word pair

## The two words

### deepen
*verb · IPA /ˈdiːpən/ · frequency rank #22,639*
To make deep or deeper

### deepest
*adjective · IPA /ˈdiːpɪst/ · frequency rank #10,031*
superlative form of deep: most deep.

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