寂しい (sabishii) means lonely or desolate.

寂しい [さびしい; /sabishii/]: lonely, lonesome. ex. 彼女がいなくてとても寂しいな。/kanojo ga inakute totemo sabishii na/ litt. "since there is not her, I (am, feel) very lonely." = "I feel very lonely without her."