selsku lujvo

c2 is said by c1 to audience c3 via expressive medium c4.

In definition:

imla
x1 is {mi} / me / the speaker, in {selsku} / message / situation x2.
odla
x1 is {do} / you / the intended listener in {selsku} / message / situation x2.

In notes:

gidyselsku
x1 is the motto made by x2 for x3 via expressive medium x4
velski
s4 is a description of s2 to audience s3 by describer s1.
astrato
x1 is a grammatical abstraction of type x2