transcription, транскрипция: [ ˈəp-ˌsīd-ˈdau̇n ]
adverb
Etymology: alteration of Middle English up so doun, from up + so + doun down
Date: 15th century
1. : in such a way that the upper and the lower parts are reversed in position
2. : in or into great disorder
turned their world upside down
• upside-down adjective