Where does “pregnant” come from?

pregnant (Old French) comes from Latin praegnans, from Latin prae-, from Proto-Italic prai-, from Proto-Indo-European preh₂-, from Proto-Indo-European per-, from Proto-Indo-European pr̥tós — passed , crossed.

Ancestry of “pregnant”, step by step

StepLanguageWordMeaning
1LatinpraegnansAlternative form of praegnās; pregnant
2Latinprae-before; in front; in charge
3Proto-Italicprai-pre-, before
4Proto-Indo-Europeanpreh₂-before, in front
5Proto-Indo-Europeanper-before, in front; first; to go through
6Proto-Indo-Europeanpr̥tóspassed , crossed

Words derived from “pregnant

Every word from Proto-Indo-European pr̥tósEvery word from Proto-Indo-European per-Every word from Proto-Indo-European preh₂-