Where does “Portsmouth” come from?

Portsmouth (Portuguese) comes from English Portsmouth, from Middle English Portesmuða, from Old English Portesmuða, from Old English port, from Latin porta, from Proto-Indo-European per-, from Proto-Indo-European pr̥tós — passed , crossed.

Ancestry of “Portsmouth”, step by step

StepLanguageWordMeaning
1EnglishPortsmouthOS grid ref SD9026
2Middle EnglishPortesmuða
3Old EnglishPortesmuða
4Old Englishporta port, a haven; a town, particularly one with...
5Latinportagate, especially of a city; entrance, passage,...
6Proto-Indo-Europeanper-before, in front; first; to go through
7Proto-Indo-Europeanpr̥tóspassed , crossed
Every word from Proto-Indo-European pr̥tósEvery word from Proto-Indo-European per-Every word from Latin porta