unexpectedness n. 想不到(出乎意外的,突然)
unexpectedness[ noun ]
extraordinariness by virtue of being unexpected
<noun.attribute>
the unexpectedness of the warm welcome
Unexpected \Un`ex*pect"ed\, a.
Not expected; coming without warning; sudden. --
{Un`ex*pect"ed*ly}, adv. -- {Un`ex*pect"ed*ness}, n.