# sideform

> English word · Noun

## Definitions
1. An alternative or variant form of a word or morpheme.

## Etymology
Uncertain. Apparent etymologies include a learned borrowing from Norwegian sideform, a calque of German Nebenform, and a compound of side + form.

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