Where does “treaty port” come from?

treaty port (English) comes from English treaty, from Middle English trete, from French traité, from French traiter, from Middle French traicter, from Old French traiter, from Latin tractāre, from Latin tractō — Derives action nouns from verb roots.

treaty port (English): a port city that was opened to foreign trade, usually consequent to the ratification of an unequal treaty

Definitions

  1. a port city that was opened to foreign trade, usually consequent to the ratification of an unequal treaty

Ancestry of “treaty port”, step by step

treaty port traces back through two separate lines of ancestry.

via English treaty

StepLanguageWordMeaning
1EnglishtreatyA binding agreement concluded by subjects of...
2Middle Englishtrete
3Frenchtraitétreatise
4Frenchtraiterto treat; to take care; to process, spray, coat
5Middle Frenchtraicterto treat
6Old Frenchtraiter
7Latintractāre
8Latintractōto tug, drag or haul
9Latin-tōForms here
10Latin-tusForms the past participle of verbs; Forms...
11Proto-Italic-tus
12Proto-Indo-European-tusDerives action nouns from verb roots

via English Port

StepLanguageWordMeaning
1EnglishPortUniversity of Portsmouth, used especially following post-nominal letters indicating status as a graduate
2EnglishportfolioA case for carrying papers, drawings,...
3Italianportafogliowallet, billfold; portfolio
4Italianfogliosheet
5Latinfoliuma leaf; a petal; a sheet or leaf of paper
6Proto-Italic*foljom
7Proto-Indo-Europeanbʰolh₃yomleaf
8Proto-Indo-Europeanbʰleh₃-bloom, flower
9Proto-Indo-Europeanbʰel-to sound; to speak, roar, bark; shiny, white; to...
10Proto-Indo-Europeanbʰōl-
Every word from Proto-Indo-European -tusEvery word from Latin -tusEvery word from Latin -tō
treaty port — Etymology, Origin & Word History | Etymology Explorer