Where does “sidesalaatti” come from?

sidesalaatti (Finnish) comes from Finnish salaatti, from Swedish sallad, from French salade, from Italian salada, from Vulgar Latin salata, from Latin Salo, from Latin saliō, from Latin sāl — salt.

Ancestry of “sidesalaatti”, step by step

sidesalaatti traces back through two separate lines of ancestry.

via Finnish salaatti

StepLanguageWordMeaning
1Finnishsalaattisalad; lettuce; any plant of the genus "Lactuca"
2Swedishsalladsalad; vegetables consisting of leaves, typically...
3Frenchsaladesalad; sallet
4Italiansalada
5Vulgar Latinsalatasalted
6LatinSalothat flows near Bilbilis and then into the Iberus, now the Jalón
7Latinsaliōto leap, jump, bound
8Latinsālsalt
9Proto-Italicsālssalt
10Proto-Indo-European*sḗh₂lsalt

via Finnish side

StepLanguageWordMeaning
1Finnishsidebandage; bond; sanitary towel
2Proto-Finnicsidekbandage
3Proto-Finnic-ekForms instrument nouns from verbs; Forms result...
4Proto-Uralic-ekForms instrument nouns from verbs; Forms result...
Every word from Proto-Indo-European *sḗh₂lEvery word from Proto-Italic sālsEvery word from Latin sāl