Where does “thwarteth” come from?

thwarteth (English) comes from English thwart, from Middle English þwerte, from Old Norse þvert, from Old Norse þverr, from Proto-Germanic þwerhaz, from Proto-Germanic þerh-, from Proto-Indo-European terkʷ- — to turn, spin.

Ancestry of “thwarteth”, step by step

thwarteth traces back through two separate lines of ancestry.

via English thwart

StepLanguageWordMeaning
1EnglishthwartPlaced or situated across something else; cross,...
2Middle Englishþwerte
3Old Norseþvertacross, athwart
4Old Norseþverrathwart, transverse; adverse, contrary; cross,...
5Proto-Germanicþwerhazcross, adverse
6Proto-Germanicþerh-
7Proto-Indo-Europeanterkʷ-to turn, spin

via English eth

StepLanguageWordMeaning
1EnglishethA letter introduced into Old English to...
Every word from Proto-Indo-European terkʷ-Every word from Proto-Germanic þerh-Every word from Proto-Germanic þwerhaz