IPA: /ˈbæk.aʊt/
KK: /ˈbækˌaʊt/
A situation where someone decides not to do something they had planned or agreed to, often causing a change in plans.
The last-minute backout of the sponsor left the event organizers scrambling for alternatives.
To withdraw from a commitment or agreement, often unexpectedly or after initially agreeing to it.
He decided to back out of the deal at the last minute.
Past: backed out
Past Participle: backed out
Backout → It is formed from "back" (from Old English "bæc", meaning the rear or reverse side) and "out" (from Old English "ūtan", meaning outside or outward). The word "backout" means to withdraw or retreat from a commitment or situation, essentially moving back out of it.
Think of moving to the 'rear' ('back') and going 'outside' ('out') — that's why backout means to withdraw or retreat.