Where does “metro” come from?

metro (Italian) comes from French métro, from French métropolitain, from Latin mētropolītānus, from Ancient Greek μητροπολίτης, from Ancient Greek μητρόπολις, from Ancient Greek πόλις, from Proto-Hellenic ptólis, from Proto-Indo-European tpólHis — fortification, city.

metro (Italian): metre, meter; ruler, ruler, measure; yardstick,...

Definitions

  1. metre, meter; ruler, ruler, measure; yardstick,...

Ancestry of “metro”, step by step

metro traces back through 3 separate lines of ancestry.

via French métro

StepLanguageWordMeaning
1Frenchmétrometro; subway US, underground UK, Tube UK
2Frenchmétropolitainmetropolitan; subway, underground; Person from...
3Latinmētropolītānusmetropolitan
4Ancient Greekμητροπολίτηςmetropolitan
5Ancient Greekμητρόπολιςmother-state; one's mother-city, mother country,...
6Ancient Greekπόλιςcity; a whole country, as dependent on and called...
7Proto-Hellenicptóliscity
8Proto-Indo-EuropeantpólHis
9Proto-Indo-EuropeantpelH-fortification, city

via Latin metrum

StepLanguageWordMeaning
1Latinmetruma measure
2Ancient Greekμέτρονsomething used to measure: measure, rule, weight;...
3Ancient Greek-τρονForms instrument nouns
4Proto-Hellenic-tronForms instrument nouns from verb stems
5Proto-Indo-European-tromForms nouns denoting a tool or instrument
6Proto-Indo-European-tḗrDerives agent nouns from verbs, denoting someone...

via Italian metropolitana

StepLanguageWordMeaning
1Italianmetropolitanametro
2Italianmetropolitanocop; point duty officer; traffic control officer

Words derived from “metro

Every word from Proto-Indo-European tpelH-Every word from Proto-Indo-European tpólHisEvery word from Proto-Hellenic ptólis
metro — Etymology, Origin & Word History | Etymology Explorer