Finnish word -asteinen comes from Finnish aste, Finnish -inen

Detailed word origin of -asteinen

Dictionary entry	Language	Definition
aste	Finnish (fin)	(everyday usage) degree, degree Celsius (short for celsiusaste). Degree. Grade. Order.
-inen	Finnish (fin)	Creates adjectives from present active participles, indicating a tendency to be/do something.. Creates adjectives indicating a material of which something is made; -en. Creates adjectives signifying a certain quality; -like, -ous, -y.
-asteinen	Finnish (fin)	Degree (used only in compounds).

Words with the same origin as -asteinen