etiology
 US /ˌiː.t̬iˈɑː.lə.dʒi/
 UK /ˌiː.t̬iˈɑː.lə.dʒi/
1. 
สาเหตุ
the cause, set of causes, or manner of causation of a disease or condition.
:
• 
a group of distinct diseases with different etiologies
2. 
สาเหตุ
the investigation or attribution of the cause or reason for something, often expressed in terms of historical or mythical explanation.