Where does “רוסיק” come from?

רוסיק (Yiddish) comes from Yiddish ־יק, from Middle High German -ec, from Old High German -ig, from Proto-West Germanic -g, from Proto-Germanic -gaz, from Proto-Indo-European -ḱos — -y, -ic.

רוסיק (Yiddish): sooty

Definitions

sooty

Ancestry of “רוסיק”, step by step

רוסיק traces back through two separate lines of ancestry.

via Yiddish ־יק

Step	Language	Word	Meaning
1	Yiddish	־יק	-y, -ic
2	Middle High German	-ec	—
3	Old High German	-ig	—
4	Proto-West Germanic	-g	Forms adjectives from nouns and verbs with a...
5	Proto-Germanic	-gaz	-y
6	Proto-Indo-European	-ḱos	-y, -ic

via Yiddish רוס

Step	Language	Word	Meaning
1	Yiddish	רוס	Russian; cockroach
2	Middle High German	ruoz	—
3	Old High German	ruoz	—
4	Proto-Germanic	hrōtaz	soot
5	Proto-Indo-European	kreH(u)d-	grime, soot

Every word from Proto-Indo-European -ḱos →Every word from Proto-Germanic -gaz →Every word from Proto-West Germanic -g →