c1 (quoted word(s)) is a name of c2 used by c3 that morphologically [strict] is a Lojbanic lujvo built from predicates metaphor/tanru l4
The morphology is according to Lojban grammar rules; as such, the word(s) c1 must end with vowels and in fact must exactly follow the morphology of brivla (and, moreover, lujvo; else, they would not be morphologically correct lujvo). l1 is essentially c1 modulo meaning and exact syntactic operation. The other terbri of lujvo (namely, l2 and l3) are not useful for names. See also: jvosmicme for a slight generalization, brivlasmicme for a greater generalization thereof.