Where does “bensatankki” come from?

bensatankki (Finnish) comes from Finnish tankki, from Swedish tank, from Swedish tänka, from Old Swedish þænkia, from Old Norse þenkja, from Low German denken, from Middle Low German denken, from Old Saxon thenkian — to think.

Ancestry of “bensatankki”, step by step

bensatankki traces back through two separate lines of ancestry.

via Finnish tankki

StepLanguageWordMeaning
1Finnishtankkitank
2Swedishtanktank (container for liquids)
3Swedishtänkathink; to ponder, to communicate to oneself in...
4Old Swedishþænkiato perceive
5Old Norseþenkja
6Low Germandenkento think
7Middle Low Germandenkento think, to perceive
8Old Saxonthenkianto think; to perceive
9Proto-West Germanicþankijanto think
10Proto-Germanicþankijanąto perceive, to think
11Proto-Indo-Europeanteng-to think

via Finnish bensa

StepLanguageWordMeaning
1Finnishbensagas, gasoline, petrol
2Finnishbensiinigasoline US, petrol UK
3Swedishbensingasoline, petrol
4GermanBenzinpetrol, gasoline
5German-īncreates the female form for many nouns for living beings; umlaut usually occurs in monosyllables, but rarely in polysyllables
6Latin-īnusof or pertaining to; -ine
7Proto-Italic-īnosof/belonging to
8Proto-Indo-European-iHnosCreates adjectives of materials
9Proto-Indo-European-no-adjectival suffix
Every word from Proto-Indo-European teng-Every word from Proto-Germanic þankijanąEvery word from Proto-West Germanic þankijan