köken: From Old French chaston, chastun, from Frankish *kastō (“box”, “case”), from Proto-Germanic *kastô (“vessel”, “container”), extended form of *kasą, *kazą.
köken: From Proto-Finnic *hëpoinën, roughly equivalent to hepo (“horse”) (now poetic) + -(i)nen (diminutive suffix). The weak grade -v- originates from the southwestern dialects, while the expected strong-grade heponen is only found in dialects, mainly in the southeast. Compare cognates in other Finnic languages such as Estonian hobune, Karelian hepoine. See hepo, *hëpo for further etymology.
aile: hevosen suusta, hevosmainen, hevostella, hevosuus, piiskata kuollutta hevosta, syödä kuin hevonen, aisahevonen, arabianhevonen, clydesdalenhevonen, hevosajoneuvo