lonesome

adjectives

being the only one; single and isolated from others

"the lone doctor in the entire county"; "a lonesome pine"; "an only child"; "the sole heir"; "the sole example"; "a solitary instance of cowardice"; "a solitary speck in the sky"

lone, lonesome, only, sole, solitary

is derived from

lonesomeness

marked by dejection from being alone

"felt sad and lonely"; "the loneliest night of the week"; "lonesome when her husband is away"; "spent a lonesome hour in the bar"

lonely, lonesome