Where does “ἀρρητοποιός” come from?

ἀρρητοποιός (Ancient Greek) comes from Ancient Greek ἄρρητος, from Ancient Greek ἀ-, from Proto-Hellenic hə-, from Proto-Indo-European sm̥-, from Proto-Indo-European sem- — together, one.

ἀρρητοποιός (Ancient Greek): practising unspeakable or taboo acts; guilty of an unmentionable vice

Definitions

practising unspeakable or taboo acts; guilty of an unmentionable vice

Ancestry of “ἀρρητοποιός”, step by step

ἀρρητοποιός traces back through two separate lines of ancestry.

via Ancient Greek ἄρρητος

Step	Language	Word	Meaning
1	Ancient Greek	ἄρρητος	unspoken
2	Ancient Greek	ἀ-	The alpha privativum, used to make words that...
3	Proto-Hellenic	hə-	same; together
4	Proto-Indo-European	sm̥-	one; with, together
5	Proto-Indo-European	sem-	together, one

via Ancient Greek ποιέω

Step	Language	Word	Meaning
1	Ancient Greek	ποιέω	To make; To do; To pretend
2	Proto-Hellenic	*kʷoiwéyō	to make

Every word from Proto-Indo-European sem- →Every word from Ancient Greek ἀ- →Every word from Proto-Indo-European sm̥- →