Where does “milestone” come from?

Milestone derives from Middle English milestone, combining Middle English stone with Latin milium (thousand), from Latin mille (thousand), ultimately from Proto-Indo-European steh₂- (to stand).

milestone (English): A stone milepost (or by extension in other materials), one of a series of numbered markers placed along a road at regular intervals, typically at the side of the road or in a median

Definitions

  1. A stone milepost (or by extension in other materials), one of a series of numbered markers placed along a road at regular intervals, typically at the side of the road or in a median

Ancestry of “milestone”, step by step

milestone traces back through two separate lines of ancestry.

via English mile

StepLanguageWordMeaning
1EnglishmileThe international mile: a unit of length...
2Middle Englishmylemile; The time it takes to walk a mile;...
3Old Englishmīlmillet; mile
4Latinmīlia
5Proto-West Germanicmīlijumile
6LatinMīllethousand; 1000
7Proto-Italicsmīɣeslīthousand
8Proto-Indo-Europeansmih₂ǵʰéslih₂

via English stone

StepLanguageWordMeaning
1EnglishstoneA hard earthen substance that can form large...
2Middle EnglishstoneA stone, boulder, or pebble; A solid mass...
3Old Englishstānstone, rock
4Old NorseVeggrname of a dwarf
5Proto-Germanicwajjuzwall
6Proto-Indo-Europeanwh̥₁yús
7Proto-Indo-Europeanweh₁y-to twist, wind, weave, plait; to wrap, enclose,...

Words derived from “milestone

Every word from Proto-Indo-European smih₂ǵʰéslih₂