# eta

> English word · Noun · IPA /ˈiːtə/ · frequency rank #17,836

## Definitions
1. The seventh letter of the Modern Greek alphabet, the eighth in Old Greek.
2. A kind of electrically neutral meson having zero spin and isospin.

## Etymology
From Ancient Greek ἦτα (êta).

## Easily confused with
- **ex** (https://plainspell.com/en/vs/eta-vs-ex)
- **EU** (https://plainspell.com/en/vs/eta-vs-eu)
- **EV** (https://plainspell.com/en/vs/eta-vs-ev)
- **ew** (https://plainspell.com/en/vs/eta-vs-ew)
- **ey** (https://plainspell.com/en/vs/eta-vs-ey)
- **ez** (https://plainspell.com/en/vs/eta-vs-ez)
- **eye** (https://plainspell.com/en/vs/eta-vs-eye)
- **eve** (https://plainspell.com/en/vs/eta-vs-eve)
- **EVA** (https://plainspell.com/en/vs/eta-vs-eva)
- **eth** (https://plainspell.com/en/vs/eta-vs-eth)
- **evo** (https://plainspell.com/en/vs/eta-vs-evo)
- **ETF** (https://plainspell.com/en/vs/eta-vs-etf)
- **ETS** (https://plainspell.com/en/vs/eta-vs-ets)
- **eww** (https://plainspell.com/en/vs/eta-vs-eww)
- **exe** (https://plainspell.com/en/vs/eta-vs-exe)
- **ewe** (https://plainspell.com/en/vs/eta-vs-ewe)
- **exam** (https://plainspell.com/en/vs/eta-vs-exam)
- **Evan** (https://plainspell.com/en/vs/eta-vs-evan)
- **Ezra** (https://plainspell.com/en/vs/eta-vs-ezra)
- **Eton** (https://plainspell.com/en/vs/eta-vs-eton)

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