An otherwise unexplained root Tolkien gave to illustrate a pronunciation example (SD/421). It may not be a real root. If it is real, it is either a biconsonantal-root with vowel-prefixion or a triconsonantal-root with a lost initial consonant such as [ɣ] or [ʔ].
Primitive adûnaic
sapad
root. ?
asad
root. ?
nak
root. ?
An otherwise unexplained root that Tolkien used to illustrate the processes of Primitive Adûnaic word formation (SD/422-3). It may have no real meaning. Even if it were, certainly only a few of its derivatives could be real words in Classical Adûnaic.
An otherwise unexplained root Tolkien gave to illustrate a pronunciation example. It may not be a real root.