IPA: /ˌkɑːrdiˈɒlədʒɪst/
KK: /kɑrdiˈɑlədʒɪst/
A doctor who focuses on diagnosing and treating heart-related health issues.
After feeling chest pain, she decided to visit a cardiologist for a check-up.
Cardiologist → It is formed from "cardio-" (from Greek "kardia", meaning heart) and "-logist" (from Greek "logia", meaning study or science). A cardiologist is a specialist who studies or practices in the field of heart health.
Think of 'kardia' meaning heart, and 'logia' meaning study — a cardiologist is someone who studies the heart.