Where does “avajaistarjous” come from?

avajaistarjous (Finnish) comes from Finnish avajaiset, from Finnish -iäinen, from Finnish -inen, from Finnish -uus, from Proto-Finnic -uc — -ness, -hood.

avajaistarjous (Finnish): inaugural offer special offer to celebrate the opening of a commercial establishment

Definitions

inaugural offer special offer to celebrate the opening of a commercial establishment

Ancestry of “avajaistarjous”, step by step

avajaistarjous traces back through two separate lines of ancestry.

via Finnish avajaiset

Step	Language	Word	Meaning
1	Finnish	avajaiset	opening, opening ceremony
2	Finnish	-iäinen	Front vowel variant of -iainen
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

via Finnish tarjous

Step	Language	Word	Meaning
1	Finnish	tarjous	offer, bid, tender
2	Finnish	tarjota	to offer; to treat; to serve
3	Finnish	tarjo-	—
4	Finnish	-ntä	Front vowel variant of -nta; API
5	Proto-Finnic	-nta	Forms action nouns from verbs

Every word from Proto-Finnic -uc →Every word from Finnish -inen →Every word from Finnish -uus →