What is the meaning of -inen?

Creates adjectives:

  1. Creates adjectives signifying a certain quality: -like, -ous, -y

    Creates adjectives signifying a certain quality: -like, -ous, -y

    Creates adjectives indicating a material of which something is made: -en

    Creates adjectives from present active participles, indicating a tendency to be/do something.

    Creates adjectives from foreign roots: -ic

    Source: wiktionary.org