It comes from the Greek word "asthenēs," meaning "weak" or "powerless."
Here are some examples of words using the prefix "astheno-":
* Asthenia: A general feeling of weakness and lack of energy.
* Asthenopia: Eye strain or fatigue.
* Asthenospermia: Low sperm count or motility.
* Asthenic: Relating to or characterized by weakness.