Where does “*doɨθ” come from?

*doɨθ (Proto-Brythonic) comes from Latin doctus, from Latin doceō, from Proto-Italic dokeō, from Proto-Indo-European deḱ- — take; perceive.

Ancestry of “*doɨθ”, step by step

StepLanguageWordMeaning
1Latindoctushaving been taught, instructed, trained; having...
2Latindoceōto inform
3Proto-Italicdokeōtell, inform; teach, instruct
4Proto-Indo-Europeandeḱ-take; perceive

Words derived from “*doɨθ”

Every word from Proto-Indo-European deḱ- →Every word from Proto-Italic dokeō →Every word from Latin doceō →