(noun) a psychological disorder marked especially by easy fatigability and often by lack of motivation, feelings of inadequacy, and psychosomatic symptoms
the neurasthenia of Descartes's Meditations
on solipsism and whether or not facts exist outside one's head
the third contestant is a neurasthenic
the kind of grotesque portraits Nabokov can paint of family underlings like his neurasthenic governess Mademoiselle