Where does “mortarboard” come from?

mortarboard (English) comes from English board, from English boardrider, from English rider, from Middle English ridere, from Middle English ryder, from Old English rīdere, from Old English rīdan, from Proto-West Germanic rīdan — to fit, to fix, to put together.

mortarboard (English): A square board, with a handle, on which mortar or...

Definitions

  1. A square board, with a handle, on which mortar or...

Ancestry of “mortarboard”, step by step

mortarboard traces back through two separate lines of ancestry.

via English board

StepLanguageWordMeaning
1EnglishboardA relatively long, wide and thin piece of any...
2Englishboardridersurfer
3EnglishriderOne who rides, often on a horse or a motorcycle;...
4Middle EnglishridereAlternative form of ryder
5Middle EnglishryderA rider or equestrian; one who rides a horse; A...
6Old Englishrīdererider, knight
7Old Englishrīdanto ride
8Proto-West Germanicrīdanto ride
9Proto-Germanicrīdanąto ride
10Proto-Indo-Europeanrēydʰ-
11Proto-Indo-Europeanh₂er-to fit, to fix, to put together

via English mortar

StepLanguageWordMeaning
1EnglishmortarA mixture of lime or cement, sand and water used...
2Middle EnglishmorterA mortar; Grout or mortar; A bowl with fuel...
3Old Frenchmortier
4Latinmortariummortar; large basin in which mortar is made
5Proto-Indo-Europeanmer-to die; to disappear; sea, lake, wetland
Every word from Proto-Indo-European h₂er-Every word from Proto-Indo-European rēydʰ-Every word from Proto-Germanic rīdaną