What is the meaning of -ilis?

-ing/-ible; used to forms adjectives from verbs meaning "acting, prone to acting, having the power to act or be acted upon".

-ile; used to form relative adjectives from verbs indicating the process by which something is produced

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