What is the meaning of -in-?

Added to mostly noun roots but also verb roots.

1. in the manner of

   in the manner of

   Forms language names.

   Added to verb roots conjugated with -on or i-, forming nouns.

   1. something done by the action of the root

      something done by the action of the root

      something put somewhere or in something

      Root form of -ino

      a product or result of something

      implies a perpetuation of action; continuous

      product of

      continuous

      passive voice marker

      passive voice marker

      forms the complete aspect in all verb triggers except the active trigger

      forms the complete aspect of patient trigger verbs marked with -in, affixed to the base form of the word

      : forms the progressive aspect in all verb triggers except in the active trigger

      1. Source: wiktionary.org