sei _{SEI

…SEhU} cmavo

start discursive (metalinguistic) bridi.

On affix form:

sepli: x₁ is apart/separate from x₂, separated by partition/wall/gap/interval/separating medium x₃.

skubancu: x₁ is metalinguistic with respect to the expression by x₂ of text x₃ for audience x₄ via medium x₅ .
lu'ei (exp!): convert a grammatical quotation to a tanru unit; x₁ expresses/says the quoted text for audience x₂ via expressive medium x₃.
sei'e (exp!): evidential builder: I know by means ...
xu'e (exp!): vocative: said/quoth..., used to identify the person speaking a single sentence (e.g. in dialogues)
ensi: x₁ (text) is written in a dialect where every bridi has arguments expressed in content/patient/recipient/stimulus semantic cases schema
esme: x₁ (text) is written in a dialect where {su'o}, {ro} quantifiers are treated as {su'oi}, {ro'oi} respectively
ilki: x₁ (text) is written in a dialect where every bridi has arguments expressed in Lakoff's image schemata
onga: x₁ (text) is written in a dialect where selbri in every bridi-tail is assumed to have {so'o'o'oi} applied to it
slurume: x₁ is a part of Lojban text representing rule 'free' according to the first edition of the book 'The Complete Lojban Language'.
upsi: x₁ (entity) acknowledges making mistake x₂ (property of x₁)