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Yes, it is an adverb. It is from the adjective surprising and means unexpectedly.
"Kahanga-hangang tagumpay" ang kahulugan ng "surprising victory" sa bersyon ng Tagalog.
Comparative of Surprise= Surprising
Superlative of Surprise= Least Surprised
The Surprising Archaea was created in 2000.
twilight is surprising there is a lot of blood by the way.