Where does “clonus” come from?

clonus (Latin) comes from Ancient Greek κλόνος, from Ancient Greek κέλομαι — to command; to urge, exhort.

Ancestry of “clonus”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	κλόνος	confused motion, turmoil, battle-rout; trembling,...
2	Ancient Greek	κέλομαι	to command; to urge, exhort