Denshi Jisho — Online Japanese dictionary

吃驚 びっくり 1:
2: (Usually written using kana alone) (Onomatopoeic or mimetic word) to be surprised; to be amazed; to be frightened; to be astonished; (Noun or verb acting prenominally) (Usually written using kana alone) (Onomatopoeic or mimetic word) surprise (e.g. surprise party)
Common word, Gikun (meaning) reading, Suru verb, Adverb 
吃驚 きっきょう surprise
Noun, Suru verb 
吃驚仰天 びっくりぎょうてん astonished; stunned; startled out of one's wits; thunderstruck; open-eyed astonishment
Noun, Suru verb 

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