# seien vs sin

> German confusable word pair

## The two words

### seien
*verb · IPA [ˈzaɪ̯ən] · frequency rank #782*
1. Person Plural Konjunktiv I Präsens Aktiv des Verbs sein

### sin
*abbrev · IPA […] · frequency rank #10,171*
Sinus

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