On grammatical class:

bu'a
logically quantified predicate variable: some selbri 1.
bu'e
logically quantified predicate variable: some selbri 2.
bu'i
logically quantified predicate variable: some selbri 3.
co'e
elliptical/unspecified bridi relationship.
du
identity selbri; = sign; x1 identically equals x2, x3, etc.; attached sumti refer to same thing.
go'a
pro-bridi: repeats a recent bridi (usually not the last 2).
go'e
pro-bridi: repeats the next to last bridi.
go'i
pro-bridi: preceding bridi; in answer to a yes/no question, repeats the claim, meaning yes.
go'o
pro-bridi: repeats a future bridi, normally the next one.
go'u
pro-bridi: repeats a remote past bridi.
mo
pro-bridi: bridi/selbri/brivla question.
nei
pro-bridi: repeats the current bridi.
no'a
pro-bridi: repeats the bridi in which this one is embedded.
cei'i
pro-bridi: the universal predicate
gai'o
pro-bridi: the empty predicate
xe'u
Abstraction variable indicator brivla.
go'ira'o
pro-bridi: preceding bridi; repeats claim as true, updating for speaker/listener change.
nago'i
selbri: repeats preceding bridi while denying it as false; pro-assign values are unchanged.

In definition:

ra'o
flag GOhA to indicate pro-assignment context updating for all pro-assigns in referenced bridi.
cmavrgo'a
x1 is the selma'o "GOhA".

In notes:

brivla
v1 is a morphologically defined predicate word signifying relation b2 in language v3.