Where does “þágufallssýki” come from?

þágufallssýki (Icelandic) comes from Icelandic þágufall, from Icelandic fall, from Old Norse fall, from Old Norse falla, from Proto-Germanic fallaną, from Proto-Indo-European pōl-, from Slovincian pól, from Proto-Slavic polъ — to split off, separate; to chop, to separate.

þágufallssýki (Icelandic): the act of erroneously using the dative case in place of another grammatical case, usually the accusative case

Definitions

  1. the act of erroneously using the dative case in place of another grammatical case, usually the accusative case

Ancestry of “þágufallssýki”, step by step

þágufallssýki traces back through two separate lines of ancestry.

via Icelandic þágufall

StepLanguageWordMeaning
1Icelandicþágufallthe dative case
2Icelandicfallfall, drop; case; function
3Old Norsefall
4Old Norsefallato fall
5Proto-Germanicfallanąto fall
6Proto-Indo-Europeanpōl-
7Slovincianpólhalf
8Proto-Slavicpolъside, flank; half; member of a pair of options →...
9Proto-Indo-European(s)pelH-to split off, separate; to chop, to separate

via Icelandic sýki

StepLanguageWordMeaning
1Icelandicsýkiillness, disease; sickness
2Proto-Germanic*siukį̄sickness
Every word from Proto-Indo-European (s)pelH-Every word from Proto-Slavic polъEvery word from Slovincian pól