also: びくんっ · びくーん
adverb taking the 'to' particle
with a start; with a jump
Mimetic adverb describing a sudden startled or jerking movement, often used with する or と.
See also: ビクッと
大きな音にビクンとした。
I started at the loud noise.
肩を叩かれてビクンと跳ねた。
I jumped with a start when someone tapped my shoulder.