ᴹ√KAB² root. “to be able, capable”
A root appearing as both √KAV and √KAB in verbal notes from the 1940s with glosses like “be able” and “capable” (PE22/105, 127). In this sense it was probably replaced by √POL in Tolkien’s later writing (PE17/181). It relationship to √KAB which was “hold, contain, retain” is unclear.
References ✧ PE22/105, 127