Where does “adekvaattinen” come from?

adekvaattinen (Finnish) comes from Finnish adekvaatti, from Latin adaequatus, from Latin adaequāre, from Latin ad-, from Latin īn-, from Latin în, from Latin en, from Proto-Italic en — in.

Ancestry of “adekvaattinen”, step by step

adekvaattinen traces back through two separate lines of ancestry.

via Finnish adekvaatti

Step	Language	Word	Meaning
1	Finnish	adekvaatti	adequate
2	Latin	adaequatus	equal; adequate
3	Latin	adaequāre	—
4	Latin	ad-	to; usually prefixed to verbs, in which cases it...
5	Latin	īn-	un-, non-, not
6	Latin	în	in, at, on, upon, from (space)
7	Latin	en	lookǃ beholdǃ; reallyǃ?; come onǃ
8	Proto-Italic	en	in
9	Proto-Indo-European	h₁én	in

via Finnish inen

Step	Language	Word	Meaning
1	Finnish	inen	—

Every word from Proto-Indo-European h₁én →Every word from Latin īn- →Every word from Latin ad- →