unforeseen

adjective

un·​fore·​seen ˌən-fȯr-ˈsēn 

: not anticipated or expected : not foreseen : unexpected

an unforeseen delay

unforeseen consequences

Synonyms of unforeseen

• sudden
• unexpected

Examples of unforeseen in a Sentence

there are almost always unforeseen consequences for any major endeavor

unforeseen problems delayed the project beyond its deadline

Recent Examples on the Web

Hope is not a strategy, so set SMART (specific, measurable, attainable, realistic and time-bound) goals that plan for your current expenses, anticipate emergency and unforeseen expenses and build security for the future. —Barbara White, Kansas City Star, 10 Dec. 2025

The state can use the money in case of an unforeseen emergency. —Alex Derosier, Twin Cities, 4 Dec. 2025

Barring any unforeseen circumstances, Semien will take over second base as Francisco Lindor's double play partner. —Drew Vonscio, MSNBC Newsweek, 3 Dec. 2025

Barring unforeseen circumstances, Gray will be one of Boston’s most important starters next season, and the Red Sox were able to get him without having to give up any of their top prospects. —Mac Cerullo, Boston Herald, 26 Nov. 2025

Word History

First Known Use

1651, in the meaning defined above

Rhymes for unforeseen

• acetylene
• adenosine
• amphetamine
• anthropocene
• antipyrine
• apomorphine
• apoprotein
• aquamarine
• arsphenamine
• azobenzene
• buprenorphine
• chlorobenzene