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"Who" is a form of "who", a pronoun which is often translated as "quién". "Indeed" is an adverb which is often translated as "ciertamente". Learn more about the difference between "who" and "indeed" below.
who()
A pronoun is a word that stands in for a noun (e.g., she).
a. quién
Hello? Who is calling?¿Hola? ¿Quién llama?
I don't know who he is, but he looks a lot like my brother.No sé quién es, pero se parece mucho a mi hermano.
2. (relative)
indeed()
An adverb is a word that describes a verb, an adjective, or other adverbs (e.g., to run quickly, very tired).
1. (truly)
a. ciertamente
The formal ball was indeed a very classy event.El baile de gala ciertamente fue un evento muy elegante.