일편단심이 · 일편단심을
single-minded devotion, unwavering loyalty
Example
그는 처음 만난 그녀에게 지금까지 일편단심이에요.
He has been devoted only to her ever since they first met.
Word parts
일 one+편 piece+단 red+심 heart
Literally 'one piece of red heart' — a sincere, loyal heart.
Good to know
Famous from 단심가, a late-Goryeo poem by Jeong Mong-ju that symbolizes loyalty.
Related words