unanticipated
adjective/ˌʌnænˈtɪsɪpeɪtɪd/
Frequency rank: #16,894 of 20,003 in the WORDED list (wordfreq data)
Meaning
not expected or foreseen beforehand.

Example sentence
The project ran over budget due to unanticipated expenses that no one had planned for.
Synonyms & related words
More words in ranks 16,801–16,900
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