An adjective for “dead” implied by the stative formation narkea “is dead” in Early Qenya Word-lists of the 1920s (PE16/140), perhaps connected to some precursor of √NDAK “slay”.
Early Quenya
nark
noun. spiteful remark, snap of a dog
narka
adjective. dead
narka
adjective. snappy, ill-tempered
mána
adjective. dead
An adjective for “dead” in the Early Qenya Grammar of the 1920s based on the verb ᴱQ. maka- “die” (PE14/58).
qalna
adjective. dead
warda
adjective. dead
A word appearing as ᴱQ. nark “spiteful remark, snap of a dog” in the Qenya Lexicon of the 1910s under the early root ᴱ√ŊARA “bite at” (QL/64).
Conceptual Development: The later Sindarin word S. narch “bitter-biting” hints that this early word might remain conceptually valid. I would therefore retain this noun as ᴺQ. narcë “rend, tear”, with extended meanings “snap of a dog; spiteful remark” for hurtful sounds based on the root ᴹ√NARAK “tear, rend (tr. and intr.)”; compare also [ᴹQ.] naraka “violent (?of sounds)” from that same root.