unforeseen

adjective

un·​fore·​seen ˌən-fȯr-ˈsēn 

: not anticipated or expected : not foreseen : unexpected

an unforeseen delay

unforeseen consequences

Synonyms

• abrupt
• sudden
• unanticipated
• unexpected
• unlooked-for

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

False Take — Called when a scene is interrupted by some unforeseen circumstance like a noise being picked up or a technical issue taking place. —Harrison Richlin, IndieWire, 17 May 2025

This new hybrid model has a number of advantages, but one of the unforeseen benefits lies in its ability to adapt to the ever-changing demands of enterprise AI. —Nick Burling, Forbes.com, 15 May 2025

Knowledge can excite wonder but so too can a joking voice, a sympathetic gesture and an unforeseen act of kindness. —Charles McNulty, Los Angeles Times, 14 May 2025

An unforeseen medical procedure has been scheduled, prohibiting touring and traveling. —Erik Pedersen, Oc Register, 13 May 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