feeling anxiety; troubled

worried, tense

a failure (of an engine, machine etc)

nervous collapse

(an instance of) collapsing

downfall, breakdown

of the nerves; easily afraid, timid

anxious, fearful

(of) a person suffering from a neurosis; (of) a person who is often very anxious

mentally maladjusted

of, like, an obsession

mentally maladjusted