A neologism coined by Paul Strack in 2022 specifically for Eldamo as a replacement for ᴱQ. sarkuva, it is simply an adjectival form of Q. hröa “body”.
Quenya
sarcuva
corporeal, bodily
hröava
adjective. corporeal, bodily
Elements
Word Gloss hröa “body, bodily form, flesh; physical matter”
sarcuva ("k") adj. "corporeal, bodily" (LT2:347; hardly a valid word in Tolkien's later Quenya, since it connects with sarco above)