lone·some 
/ˈloʊnsəm/ adjective
/ˈloʊnsəm/ adjective [more lonesome; most lonesome] chiefly US 1 : sad from being apart from other people : lonely
▪ He was/felt lonesome for his family. 2 : causing sad feelings that come from being apart from other people : lonely
▪ The empty house seemed so lonesome. 3 : not visited by or traveled on by many people : lonely
▪ a lonesome highway ▪ the lonesome frontier
▪ He was/felt lonesome for his family.
▪ The empty house seemed so lonesome.
▪ a lonesome highway ▪ the lonesome frontier
(all) by your lonesome
informal : without anyone else : entirely alone
▪ He sat by his lonesome [=by himself] at the dinner table. ▪ She made the cake all by her lonesome.
▪ He sat by his lonesome [=by himself] at the dinner table. ▪ She made the cake all by her lonesome.
