Where does “roadbook” come from?

roadbook (English) comes from English road, from Middle English rode, from Old English rād, from Proto-West Germanic raidu, from Proto-Germanic raidō, from Proto-Germanic rīdaną, from Proto-Indo-European rēydʰ-, from Proto-Indo-European h₂er- — to fit, to fix, to put together.

roadbook (English): A diagrammatic book describing a rally route; A...

Definitions

  1. A diagrammatic book describing a rally route; A...

Ancestry of “roadbook”, step by step

roadbook traces back through two separate lines of ancestry.

via English road

StepLanguageWordMeaning
1EnglishroadA way used for travelling between places,...
2Middle EnglishrodeA cross or gibbet; The cross of Christ; The cross...
3Old Englishrādroad; riding, hostile incursion; riding, road
4Proto-West Germanicraiduriding, ride
5Proto-Germanicraidōride, journey; name of the R-rune
6Proto-Germanicrīdanąto ride
7Proto-Indo-Europeanrēydʰ-
8Proto-Indo-Europeanh₂er-to fit, to fix, to put together

via English Book

StepLanguageWordMeaning
1EnglishBookthe Bible
2Germanbūchbook collection of sheets of paper bound together to hinge at one edge; long work fit for publication
3Middle High Germanbuoch
4Old High Germanbuohbook
5Proto-Germanicbōk
6Proto-Germanicbakanąto bake
7Proto-Indo-Europeanbʰeh₃g-to bake, to roast, to fry
Every word from Proto-Indo-European h₂er-Every word from Proto-Indo-European rēydʰ-Every word from Proto-Germanic rīdaną