Where does “muscus” come from?

muscus (Classical Latin) comes from Ancient Greek μόσχος, from Middle Persian mwšk', from Sanskrit मुष्क, from Sanskrit मूष्, from Proto-Indo-European múh₂s — mouse.

Ancestry of “muscus”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	μόσχος	young shoot or twig; leafstalk, petiole; calf,...
2	Middle Persian	mwšk'	musk
3	Sanskrit	मुष्क	testicle, scrotum
4	Sanskrit	मूष्	mouse; "stealer", "thief"
5	Proto-Indo-European	múh₂s	mouse

Words derived from “muscus”

Every word from Proto-Indo-European múh₂s →Every word from Sanskrit मूष् →Every word from Sanskrit मुष्क →