v1 is a morphologically defined predicate word signifying relation b2 in language v3.
Derived from bridi and valsi, deleting b3, as we are speaking of the relationship independent of particular arguments. In Lojban, such words must end in a vowel and contain a consonant cluster within the first five letters (not counting y). Not all words that can be used as a selbri (for instance members of GOhA) are brivla.