corazoncito
little heart
corazón
heart
+
-cito
diminutive suffix
Corazoncito means little heart and is formed from corazón0 (heart0) + -cito1 (diminutive suffix1).
noun
- little heartA small heart; used as a term of endearmentMi corazoncito, ¿cómo estás hoy? // My little heart, how are you today?