l1 is a regular/predictable lujvo (compound predicate word) with meaning l2 and arguments l3 built from phrase l4 and having an argument structure according to rule j1.
A Lojban-specific term. The approach of jvajvo is intended to at least constrain what the x2, x3, x4... etc. of a lujvo may be, and also to draw the semantic values of those places from the semantic values of the places of the component brivla. The rationale is that the place structure of an unknown lujvo should not require memorization. This was previously known as dikyjvo; a mistranslation of regular lujvo, as it used the wrong sense of regular (see dikni).