biku-biku
Being on edge and flinching at every little thing. A state of constant anxiety where you expect something bad.
💡Walking through a haunted house — 'I was biku-biku the whole time!'
お化け屋敷でびくびくしていた。
I was biku-biku the whole time in the haunted house.
I was ___ walking through the dark alley alone.
暗い路地を一人で歩いて○○していた。