coronary (adj) – of or pertaining to the heart; pertaining to the two arteries that encircle the heart
BREAKDOWN: CORON- (crown) + -ARY (pertaining to)
— a coronary is a heart attack, particularly a coronary thrombosis
This word is built on the root CORON-, which means meaning wreath, garland, crown, or something curved.
Common CORON- words include crown and coronary.
More esoteric CORON- words include coronal.