A root with alternate form √KHAM and gloss “bind, make fast; restrain, deprive of liberty” given as a variant of √KHEP “retain, keep” in a page of roots composed sometime around 1959-60 (VT41/6; PE17/157). It reappeared in notes from 1967 with the glosses “retain, keep, detain” and one derivative: Q. hampa “restrained, delayed, kept” (PE17/68). It might be a later iteration of ᴹ√KHAP “enfold” from The Etymologies of the 1930s (Ety/KHAP).
Neo-Eldarin: For purposes of Neo-Eldarin, I think it is useful to retain this 1930s sense, since it is the basis for various Noldorin words having to do with “clothing” for which we have no clear replacements.
A root appearing in a list of Sindarin words placed with Definitive Linguistic Notes (DLN) from 1959, given as √REÞ or √RES “remain in same place, hence be unmoved, patient”. It had the derivatives S. andreth “patience”, which appeared elsewhere as the name of a Bëorian woman (MR/305), and S. Arodreth “Noble Endurance”, a name appearing nowhere else. The variant √RES may have been intended to be the Quenya form.