1660s, present-participle adjective from surprise (v.). Related: Surprisingly.
Entries linking to surprising
surprise v.
also formerly surprize, late 14c., "overcome, overpower" (of emotions), from the noun or from Anglo-French surprise, fem. past participle of Old French surprendre (see surprise (n.)). Meaning "come upon unexpectedly" is from 1590s; that of "strike with astonishment" is 1650s.