Where does “flunssainen” come from?

flunssainen (Finnish) comes from Finnish flunssa, from Swedish flunsa, from Swedish influensa, from Italian influenza, from Latin īnfluentia, from Latin īnfluēns, from Latin īnfluō, from Latin īn- — in.

flunssainen (Finnish): Affected by common cold, flu

Definitions

Affected by common cold, flu

Ancestry of “flunssainen”, step by step

Step	Language	Word	Meaning
1	Finnish	flunssa	common cold, cold
2	Swedish	flunsa	flu
3	Swedish	influensa	influenza
4	Italian	influenza	influence; influenza, flu; third-person singular...
5	Latin	īnfluentia	influence
6	Latin	īnfluēns	flowing into
7	Latin	īnfluō	to flow or run into
8	Latin	īn-	un-, non-, not
9	Latin	în	in, at, on, upon, from (space)
10	Latin	en	lookǃ beholdǃ; reallyǃ?; come onǃ
11	Proto-Italic	en	in
12	Proto-Indo-European	h₁én	in

Every word from Proto-Indo-European h₁én →Every word from Latin īn- →Every word from Proto-Italic en →