Neurasthenic (adjective)

1. Relating to or characterized by neurasthenia.
2. Relating to or suffering from nervous exhaustion or weakness.

Origin:

Formed from the noun neurasthenia, from the greek νευρο- (neuro-) meaning "nervous" and ἀσθένεια (astheneia) meaning "weakness".

Examples:

1. The neurasthenic patient was unable to focus on anything for more than a few minutes.
2. He was a neurasthenic man, and his nerves were in a state of chronic irritation.
3. The neurasthenic symptoms of fatigue and headache were caused by the stress of her job.
4. His neurasthenic tendencies made it difficult for him to function in social situations.
5. The neurasthenic state of her mind made it difficult for her to make decisions.