# breakthrough

> English word · Adjective · IPA /ˈbɹeɪk.θɹuː/ · frequency rank #9,143

## Definitions
1. Characterized by major progress or overcoming some obstacle.
2. Involving the contraction of a disease by a person with a decreased susceptibility, such as a person who has been vaccinated to help prevent that disease.

## Etymology
From break + through. Compare German Durchbruch and Dutch doorbraak (“breakthrough”, literally “through-break”).

## Common misspellings (19)
`bbreakthrough`, `berakthrough`, `braekthrough`, `breakhtrough`, `breakkthrough`, `breakthhrough`, `breakthorugh`, `breakthroguh`, `breakthrouggh`, `breakthroughh`, `breakthrouhg`, `breakthrrough`, `breakthruogh`, `breaktrhough`, `breaktthrough`, `breatkhrough`, `brekathrough`, `brreakthrough`, `rbeakthrough`

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