Where does “thickskull” come from?

thickskull (English) comes from English thick, from Middle English thikke, from Old English þicce, from Proto-West Germanic þikkwī, from Proto-Germanic þekuz, from Proto-Indo-European tégus, from Proto-Indo-European teg-.

thickskull (English): A dullard; a blockhead

Definitions

  1. A dullard; a blockhead

Ancestry of “thickskull”, step by step

thickskull traces back through two separate lines of ancestry.

via English thick

StepLanguageWordMeaning
1EnglishthickRelatively great in extent from one surface to...
2Middle EnglishthikkeAlternative form of thicke
3Old Englishþiccethick
4Proto-West Germanicþikkwīthick
5Proto-Germanicþekuzthick
6Proto-Indo-Europeantégusthick
7Proto-Indo-Europeanteg-

via English skull

StepLanguageWordMeaning
1EnglishskullThe main bones of the head considered as a unit;...
2Middle Englishscullea type of oar
3Old Norseskallia bald head; bald head, skull
4Proto-Germanicskaljōshell; husk; rind; peel
5Proto-Indo-European(s)kelH-to cut; to split, to separate
6Proto-Indo-European(s)kel-to bend, crook; bent, crooked; leg, heel, knee,...
Every word from Proto-Indo-European teg-