# eureka

> English word · Interjection · IPA /jəˈɹiː.kə/ · frequency rank #19,080

## Definitions
1. An exclamation indicating a sudden discovery.

## Etymology
From Ancient Greek εὕρηκα (heúrēka, “I have found”), perfect active indicative first person singular of εὑρίσκω (heurískō, “to find”). Archimedes supposedly exclaimed this when he figured out how to determine the density of an object. First use appears c. 1603 in a text by Philemon Holland.

## Easily confused with
- **Europa** (https://plainspell.com/en/vs/eureka-vs-europa)
- **Erika** (https://plainspell.com/en/vs/erika-vs-eureka)

## Common misspellings (7)
`erueka`, `euerka`, `eureak`, `eurekka`, `eurkea`, `eurreka`, `uereka`

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