# diagnose

> English word · Verb · IPA /ˈdʌɪ.əɡˌnəʊz/ · frequency rank #16,889

## Definitions
1. To determine which disease is causing a sick person's signs and symptoms; to find the diagnosis.
2. To determine the cause of a problem.

## Etymology
Back-formation from diagnosis. Compare also sclerose (verb).

## Easily confused with
- **diagnosis** (https://plainspell.com/en/vs/diagnose-vs-diagnosis)
- **diagnoses** (https://plainspell.com/en/vs/diagnose-vs-diagnoses)

## Common misspellings (11)
`daignose`, `ddiagnose`, `diaggnose`, `diagnnose`, `diagnoes`, `diagnosse`, `diagnsoe`, `diagonse`, `diangose`, `diganose`, `idagnose`

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