bikutto
An involuntary physical jerk or flinch from a sudden stimulus — a loud noise, someone tapping your shoulder, an unexpected sight.
💡Someone sneaking up behind you — 'I went bikutto when he tapped my shoulder.'
急に肩を叩かれてびくっとした。
I flinched bikutto when someone suddenly tapped my shoulder.
The thunder was so loud I ___ in my chair.
雷の音が大きくて、椅子で○○した。