Where does “thī” come from?

thī (Old Frisian) comes from Proto-Germanic þiz, from Proto-Indo-European te, from Proto-Indo-European túh₂ — you, thou.

thī (Old Frisian): that

Definitions

  1. that

Ancestry of “thī”, step by step

thī traces back through two separate lines of ancestry.

via Proto-Germanic þiz

StepLanguageWordMeaning
1Proto-Germanicþizdative/instrumental of *þū
2Proto-Indo-Europeanteclitic accusative of *túh₂: thee
3Proto-Indo-Europeantúh₂you, thou

via Proto-Germanic *sa

StepLanguageWordMeaning
1Proto-Germanic*sa—
2Proto-Austronesian*əsa—
3Proto-Oceanic*isa—

Words derived from “thī”

Every word from Proto-Indo-European túh₂ →Every word from Proto-Indo-European te →Every word from Proto-Germanic þiz →