The word ᴱQ. qerka appeared in the Gnomish Lexicon of the 1910s as the cognate of G. cwerc “throat” (GL/28). ᴱQ. qerka “throat” appeared again in Early Qenya Word-lists of the 1920s (PE16/136), but in a list of body parts from this same period it was ᴱQ. qelqa “throat” (PE14/117). There are no signs of these words in Tolkien’s later writings.
Early Quenya
qerka
noun. throat
qerkaringa
place name. Chill Gulf
qelqa
noun. throat
The gulf between Helkarakse and Middle-earth in the earliest Lost Tales (LT1/167), a combination of qerka “throat” with ringa “cold”.