A noun in The Etymologies of the 1930s glossed “soil” derived from the root ᴹ√KEM “soil, earth” (Ety/KEM). It had a rather unusual plural form ceif which shows i-intrusion but not the usual i-raising of e to i; under ordinary phonetic developments the expected plural would be ✱cif. I can think of no good reason for this abnormal plural, but it would be ^caif if adapted to Sindarin. It is mostly moot since this word is very unlikely to be used in the plural.
Noldorin
moe
adjective. soft, pliant
moe
adjective. soft
mō
noun. hand
cam
noun. hand
cam
noun. hand
camb
noun. hand
camm
noun. hand
camm
noun. hand
cef
noun. soil
cef
noun. soil
gwass
noun. stain
gwass
noun. stain
gwath
noun. stain
gwatha-
verb. to soil, stain
hmael
noun/adjective. stain
hmael
noun/adjective. stained
hmaw
noun. soil, stain
liss
noun. soft
mael
noun/adjective. stain
mael
noun/adjective. stained
maw
noun. soil, stain
ON. hand