Where does “vasta kun” come from?

vasta kun (Finnish) comes from Finnish vasta, from Swedish kvast, from Old Swedish quaster, from Old Norse kvǫstr, from Proto-Germanic kwastuz, from Proto-Indo-European gʷes- — twig; leafwork.

vasta kun (Finnish): only after, only when, not before

Definitions

only after, only when, not before

Ancestry of “vasta kun”, step by step

vasta kun traces back through two separate lines of ancestry.

via Finnish vasta

Step	Language	Word	Meaning
1	Finnish	vasta	Expressing delay or that something takes place...
2	Swedish	kvast	broom; tassel; cyme
3	Old Swedish	quaster	—
4	Old Norse	kvǫstr	—
5	Proto-Germanic	kwastuz	tuft; tassel
6	Proto-Indo-European	gʷes-	twig; leafwork

via Finnish kun

Step	Language	Word	Meaning
1	Finnish	kun	when, as; as soon as, once; expresses that the...
2	Finnish	moinen	such; -like
3	Finnish	-inen	-like, -ous, -y; -en; Creates adjectives from...
4	Finnish	-uus	Forms nouns from adjectives, expressing a quality
5	Proto-Finnic	-uc	-ness, -hood

Every word from Proto-Indo-European gʷes- →Every word from Proto-Germanic kwastuz →Every word from Old Norse kvǫstr →