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"Delgada" is a form of "delgado", an adjective which is often translated as "thin". "Soy baja" is a phrase which is often translated as "I'm short". Learn more about the difference between "soy baja" and "delgada" below.
soy baja()
A phrase is a group of words commonly used together (e.g., once upon a time).
delgado()
An adjective is a word that describes a noun (e.g., the big dog).
1. (slender)
2. (delicate)