surprising

To cause (someone) to feel unusually alarmed or delighted by something unexpected.

“It surprises me that I owe twice as much as I thought I did.”

To do something to (a person) that they are not expecting, as a surprise.

“He doesn’t know that I’m in the country – I thought I’d turn up at his house and surprise him.”

To undergo or witness something unexpected.

“He doesn’t surprise easily.”

To cause surprise.

To attack unexpectedly.

To take unawares.

A situation in which somebody is surprised.

Causing surprise.

“A surprising number of people attended the rally.”