Where does “tarmacadam” come from?

tarmacadam (English) comes from English tar, from Middle English ter, from Old English teoru, from Old English teru, from Proto-Germanic terwą, from Pre-Germanic derwom, from English doru, from Ancient Greek δόρυ — hard, firm, strong, solid; hard, fast; tree.

tarmacadam (English): A mixture of tar and small stones used in paving;...

Definitions

  1. A mixture of tar and small stones used in paving;...

Ancestry of “tarmacadam”, step by step

tarmacadam traces back through two separate lines of ancestry.

via English tar

StepLanguageWordMeaning
1EnglishtarA black, oily, sticky, viscous substance,...
2Middle EnglishterTar or a similar substance; Alternative form of...
3Old EnglishteoruAlternative spelling of teru
4Old Englishterutar, resin; earwax
5Proto-Germanicterwątar
6Pre-Germanicderwom
7EnglishdoruAlternative form of dory
8Ancient Greekδόρυwood, tree, stem; spear shaft, spear, lance,...
9Proto-Hellenicdórutree
10Proto-Indo-Europeandórutree
11Proto-Indo-Europeandrew-hard, firm, strong, solid; hard, fast; tree

via English MacAdam

StepLanguageWordMeaning
1EnglishMacAdamThe surface of a road consisting of layers of crushed stone (usually tar-coated for modern traffic)
2Scottish Gaelicmacson; Commonly used as a prefix of Irish and...
3Middle Irishmacson
4Old Irishmaccson; child
5Primitive IrishᚋᚐᚊᚊᚔAlternative form of ᚋᚐᚊᚔ
6Proto-Celticmakkʷos
7Proto-Indo-Europeanmeh₂ḱ-to raise, increase; long

Words derived from “tarmacadam

Every word from Proto-Indo-European drew-Every word from Proto-Indo-European dóruEvery word from Proto-Hellenic dóru