The story
- Middle English · inherited fromherte“heart”
- Middle English · inherited fromhartestrynges
- English todayheartstrings
PIE word *ḱḗr From Late Middle English hartestrynges, hert strynges, from Middle English herte (“heart”) + strenges, strynges (“cords, strings”). The English word is analysable as heart + strings.
First known use, by meaning
- 15th–19th c. The tendons or other structures resembling cords once thought to be attached to, or to brace, the heart; especially the aorta, pulmonary artery, and other large arteries connected to them; also, the diaphragm.
- from 16th c. The source of one's deepest emotions or inner feelings, especially compassion or love.
Etymology from Wiktionary, CC BY-SA 4.0.