unexpected, surprising, unforeseen (similar to 思いもよらない, but sometimes slightly less strong or interchangeable)

💡 Nuance & Usage: Very similar to "思いもよらない", often used interchangeably, emphasizing an event beyond what was expected or considered. (「思いもよらない」と非常に似ており、予想や考慮の範囲外の出来事を強調する際に互換的に使われることが多い)