Where does “teul” come from?

teul (Middle Cornish) comes from Old Cornish tiwoulgou, from Proto-Brythonic tɨβ̃uɨl, from Proto-Celtic temeslos, from Proto-Indo-European tēmH- — dark.

Ancestry of “teul”, step by step

StepLanguageWordMeaning
1Old Cornishtiwoulgou—
2Proto-Brythonictɨβ̃uɨldarkness
3Proto-Celtictemeslosdarkness
4Proto-Indo-EuropeantēmH-dark

Words derived from “teul”

Every word from Proto-Indo-European tēmH- →Every word from Proto-Celtic temeslos →Every word from Proto-Brythonic tɨβ̃uɨl →