一骨碌

yī gū lu

with a rolling or twisting movement

in a single movement; in one breath

one

used in 骨碌碌[gu1 lu4 lu4]

lu

(bound form used in 忙碌[mang2 lu4], 勞碌|劳碌[lao2 lu4], 庸碌[yong1 lu4] etc)