A verb for “to leap” implied by the noun [gerund] cabed “leap” in names like Cabed Naeramarth “Leap of Dreadful Doom” and Cabed-en-Aras “Deer’s Leap” (S/224; UT/150).
Conceptual Development: This verb dates all the way back to the Gnomish Lexicon of the 1910s, which had G. cab- “jump, leap” (GL/24) clearly based on the early root ᴱ√KAPA “leap, spring” from the contemporaneous Qenya Lexicon (QL/45). The Early Qenya Phonology had ᴱN. hab- “to jump” based on a variant root ᴱ✶skap- (PE14/66), but at some point after this cab- was restored, as implied by N. cabor “frog = ✱leaper” from The Etymologies of the 1930s (Ety/KAP).
cap- ("k")vb. "jump, leap", pa.t. campë (QL:45, PE16:134)