jiksei lujvo

s1=j1 is aloof/alone/solitary/a hermit, separated from s2=j1.


In notes:

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