Where does “fattlaus” come from?

fattlaus (Icelandic) comes from Icelandic laus, from Old Norse lauss, from Proto-Germanic lausaz, from Proto-Indo-European lewH- — louse.

fattlaus (Icelandic): clueless, oblivious, who doesn't pick up on things

Definitions

  1. clueless, oblivious, who doesn't pick up on things

Ancestry of “fattlaus”, step by step

fattlaus traces back through two separate lines of ancestry.

via Icelandic laus

StepLanguageWordMeaning
1Icelandiclausloose; free to go; available
2Old Norselaussloose
3Proto-Germaniclausazloose, free; empty, devoid; false, untrue
4Proto-Indo-EuropeanlewH-louse

via Icelandic fatta

StepLanguageWordMeaning
1Icelandicfattato get, catch on, take in
2Danishfatteto understand or grasp the true meaning or significance of something
3Middle Low Germanvāten—
4Old Dutchfaton—
Every word from Proto-Indo-European lewH- →Every word from Proto-Germanic lausaz →Every word from Old Norse lauss →