seicni lujvo

c1=s1 feels lonely/separated from s2.

Cf. kancni (antonym), nonseka, nonkansa, caucni.


In notes:

caucni
cl1=ci1 (misses / emotionally feels the lack of) cl2=ci3.
caurgau
g1 (person/agent) deprives c1 of c2.
kancni
x1 feels togetherness towards x2
nonkansa
x1 is alone/lonely/lonesome in state/condition/enterprise x2.
pevyplu
x1 is like an island in a sea of x2; x1 is very distinct/foreign (in appearance, composition and/or behavior) from surroundings/environment/background x2.
smacni
c1 is calm about x2=c3.