Solitary

едини́чный

jediníčnyj

(single; individual; sole)

одино́кий

odinókij

(living alone or being by oneself)

одиночный

odinočnyj

(performed, passed, or endured alone)

уединённый

ujedinjónnyj

(not much visited or frequented; remote from society)

затво́рник

zatvórnik

(one who lives alone)

отше́льник

otšélʹnik

(one who lives alone)