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"Qué bonito" is a phrase which is often translated as "how pretty", and "bello" is an adjective which is often translated as "beautiful". Learn more about the difference between "qué bonito" and "bello" below.
qué bonito()
A phrase is a group of words commonly used together (e.g., once upon a time).
1. (general)
bello()
An adjective is a word that describes a noun (e.g., the big dog).