canta (1) ("k") cardinal "four" (KÁNAT, VT42:24, VT48:6). In the Etymologies as printed in LR, this word was cited with a final hyphen (as if it were a verb), but the hyphen does not actually appear in Tolkien's manuscript (VT45:19). Ordinal cantëa ("k") "fourth" (VT42:25) Compare cantil.
Quenya
cantëa
fourth
cantëa
ordinal. fourth
canta
cardinal. four
canta
cardinal. four
can-
cardinal. four
can- (1) (prefix)("k") "four" (KÁNAT)
cantëa ("k") ordinal "fourth" (VT42:25)