# up so down

> English word · Adverb

## Definitions
1. Obsolete form of upside down.

## Etymology
From Middle English up-so-doun, upsedowne, upsadowne (“upside down”); equivalent to up + so + down, literally “up as down”.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-03.
Canonical page: https://plainspell.com/en/word/up-so-down