heart
/hɑːrt/·하트·noun
the organ that pumps blood; the seat of feeling
Old EnglishCEFR A1
Root
Proto-Indo-European '*ḱerd-' (heart)
PIE *ḱerd- → Proto-Germanic *hertô → Old English heorte → Modern heart
In a word
Old English heorte. A word that hasn't moved seat for 5,000 years — all the way back to Proto-Indo-European. Latin cor (→ courage), Greek kardia (→ cardio): same root, different paths. English just kept the Germanic native form intact. Five languages, same meaning, separate paths — the heart sits at a place too universal to outsource.
Examples
Her heart beat fast.
He spoke from the heart.
The heart of the city is the old square.
Related
heartyheartfeltheartbeatsweetheartheartless