Learn how to say Etiological correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word aetiology:
1 Medicine the cause, set of causes, or manner of causation of a disease or condition:
the importance of sunlight in the aetiology of melanoma
a group of distinct diseases with different aetiologies
the causation of diseases and disorders as a subject of investigation.
2the investigation or attribution of the cause or reason for something, often expressed in terms of historical or mythical explanation.
mid 16th century: via medieval Latin from Greek aitiologia, from aitia ‘a cause’ + -logia (see -logy)