unforeseen
adj.adj. not expected or predicted. You use this to describe something that happens suddenly and surprises you because you did not see it coming.
adj. not anticipated or predicted; occurring without prior warning. Often used to describe complications, costs, or events that disrupt a plan.
The project was delayed due to unforeseen problems.
The company had to adjust its budget after several unforeseen expenses arose during the final stage of production.
While the initial strategy was sound, the sudden shift in global trade policy created an unforeseen obstacle that required the entire board to rethink their long-term expansion goals.
From un- + foreseen.
Typically used attributively before a noun, such as 'unforeseen circumstances' or 'unforeseen consequences'.
The event was very unforeseen.The event was completely unforeseen.Unforeseen is often treated as a non-gradable adjective; it is more naturally paired with 'completely' or 'totally' than with 'very'.