Where does “muscles” come from?

muscles (French) comes from French muscle, from Middle French muscle, from Latin mūsculus, from Ancient Greek μῦς, from Proto-Hellenic *mū́s, from Proto-Indo-Iranian múHs, from Proto-Indo-European múh₂s — mouse.

muscles (French): plural of muscle; second-person singular present...

Definitions

plural of muscle; second-person singular present...

Ancestry of “muscles”, step by step

Step	Language	Word	Meaning
1	French	muscle	muscle; first-person singular present indicative...
2	Middle French	muscle	muscle
3	Latin	mūsculus	a small mouse
4	Ancient Greek	μῦς	mouse; A type of mussel; A type of whale
5	Proto-Hellenic	*mū́s	—
6	Proto-Indo-Iranian	múHs	mouse
7	Proto-Indo-European	múh₂s	mouse

Every word from Proto-Indo-European múh₂s →Every word from Proto-Indo-Iranian múHs →Every word from Proto-Hellenic *mū́s →