IPA: /ˌdaɪəˈθɜrmi/
KK: /daɪəˈθɜrmi/
A medical treatment that uses high-frequency electric currents to generate heat in body tissues, often for therapeutic or surgical purposes.
The doctor recommended diathermy to help relieve the patient's muscle pain.
Diathermy is formed from "dia-" (meaning through) and "thermē" (meaning heat). The word describes a method of generating heat in body tissues through electric currents, effectively allowing heat to pass through the body.
Think of 'heat' ('thermē') passing 'through' ('dia-') the body, which is what diathermy does.