köken: From Middle High German knolle, Old High German *chnollo, from Proto-Germanic *knudan-, *knudla-, *knulla- (“lump”), possibly related to Old English cnotta. Cognate with Old English cnoll, Dutch knol, English knoll.
köken: From earlier knolle; first attested in the early sixteenth century. The earliest attested meaning in Dutch is "turnip" (now obsolete, the derived knolraap having become the standard term), which appears to be the result of a semantic narrowing from a broader meaning "bulging protrusion"; compare for example the cognates Old High German knollo (“rocky outcrop; lump”), English knoll (“hill”).
aile: knollen voor citroenen verkopen, knolraap, knolselderij, knolsteenbreek, Oostknollendam, Westknollendam
köken: From Old Malay hubi, as attested in the Tanjung Tanah manuscript dated 14th century, from Proto-Malayic *hubi, from Proto-Malayo-Chamic *hubi, from Proto-Malayo-Sumbawan *hubi, from Proto-Malayo-Polynesian *qubi (“yam”).
aile: berubi [stative, habitual], ubi-ubian [reduplication + resultative, locative, collective, variety, verbal noun, fruit], ubi kayu, ubi kentang