lonesome
adj.adj. feeling sad because you are alone or do not have any friends around you. It describes a deep sense of being lonely, often in a way that feels a bit empty or quiet.
adj. feeling a depressive sense of solitude or lack of companionship. Often carries a more emotive or poetic tone than 'lonely' and is frequently used predicatively after linking verbs like 'feel' or 'sound'.
He felt very lonesome after his best friend moved away.
The sound of a lonesome whistle echoed through the empty valley as the train passed by.
After decades of living in the bustling city, he found the silence of the countryside to be more lonesome than peaceful, missing the constant hum of human activity.
From lone + -some, mid-17th century.
Often used predicatively after linking verbs like 'feel', 'look', or 'sound'.