What is the meaning of -ilis?

-ile; forms adjectives of relation, frequently passive, to verbs.

1. -able/-ible; forms passive adjectives meaning "prone to be/able to be" the object or target of the base verb

   -able/-ible; forms passive adjectives meaning "prone to be/able to be" the object or target of the base verb

   -ing; forms adjectives meaning "acting, prone to acting, having the power to act" in a certain way

   -ed; forms passive adjectives indicating the state resulting from an action or process

   used to form an adjective from a noun or adjective stem, sometimes with passive meaning

   -ile; used to form adjectives, usually from nouns, indicating a relationship or a pertaining to.

   Source: wiktionary.org