Where does “ōrdinem” come from?

ōrdinem (Latin) comes from Middle Low German orden, from Latin ōrdināre, from Latin ōrdō, from Proto-Italic ored(h)- — to arrange.

Ancestry of “ōrdinem”, step by step

Step	Language	Word	Meaning
1	Middle Low German	orden	—
2	Latin	ōrdināre	—
3	Latin	ōrdō	—
4	Proto-Italic	ored(h)-	to arrange