This is the 3794th most frequent Japanese word.
ぱち
"ぱち" is an onomatopoeic word in Japanese that can represent the sound of something snapping, popping, or clapping.
ぱちぱち is used here to describe the repeated blinking motion made in reaction to surprise.
彼は驚いて目をぱちぱちさせました。
He blinked his eyes in surprise.
ぱちぱち evokes the crackling or popping sound commonly associated with fireworks.
花火のぱちぱちという音が聞こえます。
The crackling sound of fireworks can be heard.
ぱちっと represents a single snapping or clicking sound, signifying the action of closing the toy securely.