Where does “пертурбация” come from?

пертурбация (Russian) comes from Spanish perturbar, from Latin perturbō, from Latin turbo, from Latin turba, from Ancient Greek τύρβη, from Proto-Indo-European twerH- — to enclose, fence in; to grab, seize; to stir.

Ancestry of “пертурбация”, step by step

Step	Language	Word	Meaning
1	Spanish	perturbar	to perturb, to disturb, to bother
2	Latin	perturbō	—
3	Latin	turbo	tornado, whirlwind; crowd; I disturb, unsettle,...
4	Latin	turba	stir, disturbance, tumult, uproar, trouble; mob,...
5	Ancient Greek	τύρβη	disorder, confusion, tumult; poetic rout, revelry
6	Proto-Indo-European	twerH-	to enclose, fence in; to grab, seize; to stir

Every word from Proto-Indo-European twerH- →