Showing sincere, complete, and enthusiastic commitment or emotion without holding back anything.
Compound of 'full' and 'hearted' (having a specified kind of heart or disposition), from Old English, expressing the idea of giving one's complete emotional dedication.
Words about the 'heart' reveal how ancient people understood emotions—they literally thought the heart was the seat of feelings and courage, so 'full-hearted' meant emotionally complete and brave.
Complete word intelligence in one call. Free tier — 50 lookups/day.