Where does “þumalfingur” come from?

þumalfingur (Icelandic) comes from Icelandic þumall, from Old Norse þumall, from Proto-Germanic þūmilaz, from Proto-Germanic þūmô, from Proto-Indo-European tūm-, from Proto-Indo-European tewh₂- — to swell; to crowd; to be strong.

þumalfingur (Icelandic): a thumb

Definitions

  1. a thumb

Ancestry of “þumalfingur”, step by step

þumalfingur traces back through two separate lines of ancestry.

via Icelandic þumall

StepLanguageWordMeaning
1Icelandicþumallthumb
2Old Norseþumallthumb
3Proto-Germanicþūmilazthumb-covering; thumb-sheath
4Proto-Germanicþūmôthumb
5Proto-Indo-Europeantūm-to grow; to swell, to increase; to swell, be...
6Proto-Indo-Europeantewh₂-to swell; to crowd; to be strong

via Icelandic fingur

StepLanguageWordMeaning
1Icelandicfingurfinger
2Old Norsefingrfinger
3Proto-Germanicfingrazfinger
4Proto-Indo-Europeanpenkʷrós—
Every word from Proto-Indo-European tewh₂- →Every word from Proto-Indo-European tūm- →Every word from Proto-Germanic þūmô →