Where does “*orð” come from?

*orð (Brythonic) comes from Proto-Celtic ordos, from Mongolian ᠣᠷᠳᠣᠰ.

Ancestry of “*orð”, step by step

Step	Language	Word	Meaning
1	Proto-Celtic	ordos	hammer
2	Mongolian	ᠣᠷᠳᠣᠰ	—

*orð — Etymology, Origin & Word History | Etymology Explorer