Where does “thin” come from?

thin (Old Saxon) comes from Proto-West Germanic þīn, from Proto-Germanic þīnaz, from Proto-Indo-European téynos, from Proto-Indo-European túh₂ — you, thou.

thin (Old Saxon): thy, your; thine, yours; instrumental singular...

Definitions

  1. thy, your; thine, yours; instrumental singular...

Ancestry of “thin”, step by step

StepLanguageWordMeaning
1Proto-West Germanicþīnyour, yours
2Proto-Germanicþīnazyour, yours (thy, thine); 2nd person singular possessive
3Proto-Indo-Europeantéynosthy; thine
4Proto-Indo-Europeantúh₂you, thou
Every word from Proto-Indo-European túh₂ →Every word from Proto-Indo-European téynos →Every word from Proto-Germanic þīnaz →