Where does “waterboarding” come from?

waterboarding (Polish) comes from English waterboarding, from English waterboard, from English board, from English boardrider, from English rider, from Middle English ridere, from Middle English ryder, from Old English rīdere — to fit, to fix, to put together.

Ancestry of “waterboarding”, step by step

StepLanguageWordMeaning
1EnglishwaterboardingA torture technique in which the victim is immobilized, has towels or rags wrapped over their face, and has water poured onto them, causing them to experience the sensation of drowning
2EnglishwaterboardA board set up to windward in a boat, to keep out...
3EnglishboardA relatively long, wide and thin piece of any...
4Englishboardridersurfer
5EnglishriderOne who rides, often on a horse or a motorcycle;...
6Middle EnglishridereAlternative form of ryder
7Middle EnglishryderA rider or equestrian; one who rides a horse; A...
8Old Englishrīdererider, knight
9Old Englishrīdanto ride
10Proto-West Germanicrīdanto ride
11Proto-Germanicrīdanąto ride
12Proto-Indo-Europeanrēydʰ-
13Proto-Indo-Europeanh₂er-to fit, to fix, to put together
Every word from Proto-Indo-European h₂er-Every word from Proto-Indo-European rēydʰ-Every word from Proto-Germanic rīdaną