Where does “idiomaattisuus” come from?

idiomaattisuus (Finnish) comes from Finnish idiomaattinen, from Ancient Greek ἰδιωματικός, from Ancient Greek ἰδίωμα, from Ancient Greek ἰδιοῦσθαι, from Ancient Greek ἴδιος, from Proto-Hellenic *hwédios.

idiomaattisuus (Finnish): idiomaticity

Definitions

idiomaticity

Ancestry of “idiomaattisuus”, step by step

idiomaattisuus traces back through two separate lines of ancestry.

via Finnish idiomaattinen

Step	Language	Word	Meaning
1	Finnish	idiomaattinen	idiomatic
2	Ancient Greek	ἰδιωματικός	related to an idiom
3	Ancient Greek	ἰδίωμα	peculiarity, specific property, unique feature;...
4	Ancient Greek	ἰδιοῦσθαι	to make one's own, appropriate to oneself
5	Ancient Greek	ἴδιος	pertaining to self, that is, one's own; private;...
6	Proto-Hellenic	*hwédios	—

via Finnish uus

Step	Language	Word	Meaning
1	Finnish	uus	Alternative form of uusi

Every word from Proto-Hellenic *hwédios →Every word from Ancient Greek ἴδιος →Every word from Ancient Greek ἰδιοῦσθαι →