Where does “matris” come from?

matris (Bikol Central) comes from Spanish matriz, from Latin mātrīx, from Latin māter, from Ancient Greek ἄρχω, from Proto-Indo-European h₂ergʰ- — to begin; to command, rule; to begin, rule,...

Ancestry of “matris”, step by step

Step	Language	Word	Meaning
1	Spanish	matriz	uterus; head office or store; matrix
2	Latin	mātrīx	uterus, womb
3	Latin	māter	mother female parent
4	Ancient Greek	ἄρχω	To begin; To lead, rule, govern, command; To be...
5	Proto-Indo-European	h₂ergʰ-	to begin; to command, rule; to begin, rule,...

Every word from Proto-Indo-European h₂ergʰ- →Every word from Ancient Greek ἄρχω →Every word from Latin māter →