jumpy

老旧的电梯运行时总是颠簸不稳。

The old elevator moves in a ___jumpy way.

他最近工作压力很大，变得很容易受惊。

He's been feeling ___jumpy lately due to work stress.

她总是有点神经质，听到一点声音就会吓一跳。

She's always ___jumpy, jumping at the slightest sound.