ventanilla
window
ventana
window
+
-illa
diminutive suffix
Ventanilla means window (usually a small one) and is composed of ventana0 (window0) + -illa1 (diminutive suffix1), indicating a small window.
noun
- windowA small window, especially one in a vehicle or at a service counterPor favor, cierra la ventanilla del coche. // Please close the car window.