What is the meaning of -isk?

alternative form of -sk

-ish (of or pertaining to)

-esque (in the style or manner of)

also forming adjectives from nouns.

-ish (of or pertaining to)

-esque (in the style or manner of)

also forming adjectives from nouns.

-ish, of or pertaining to; making an adjective based on a noun

Source: wiktionary.org