What is the meaning of -sk?

Forms adjectives from nouns with sense of pertaining to

Forms adjectives appended to roots denoting names of nations or regions

Forms adjectives describing a certain look or character

feminine nominative singular of -skur

neuter nominative plural of -skur

neuter accusative plural of -skur

-ish (of or pertaining to)

-ish (of a nationality, or the language associated with a nationality)

used to form adjectives from nouns and verbs.

-ish (of or pertaining to)

-ish (of a nationality, or the language associated with a nationality)

used to form adjectives from nouns and verbs.

alternative form of -isk

-ish

Source: wiktionary.org