cfatse lujvo

x1 sits down on x2.

Cf. >|< |.">co'a, cfari, zutse, nitytse, tsebi'o. Simple zutse refers to the act of sitting, whereas cfatse means the act of beginning to sit.

In notes:

nitytse
z1 sits on surface z2=c1 that is below c2 in frame of reference c3.
tsebi'o
b1=z1 sits down on surface z2.