Where does “transom” come from?

Transom comes from Middle English traunsom, of uncertain origin and meaning.

transom (English): A crosspiece over a door; a lintel; A horizontal...

Definitions

  1. A crosspiece over a door; a lintel; A horizontal...

Ancestry of “transom”, step by step

StepLanguageWordMeaning
1Middle Englishtraunsomcrosspiece, crossbeam
2Latintranstrumcrossbeam, transom; thwart of a vessel
3Latintrānsacross, beyond
4LatinPadusthe River Po
5LeponticBodincus—
6Proto-Indo-Europeanbʰudʰmḗnbottom
7Proto-Indo-Europeandʰewbʰ-deep
8Proto-Indo-Europeandʰewh₂-smoke; mist, haze

Words derived from “transom”

Every word from Proto-Indo-European dʰewh₂- →Every word from Proto-Indo-European dʰewbʰ- →Every word from Proto-Indo-European bʰudʰmḗn →
transom — Etymology, Origin & Word History | Etymology Explorer