Quick answer
"Who" is a pronoun which is often translated as "quién", and "why" is an adverb which is often translated as "por qué". Learn more about the difference between "who" and "why" below.
who(
hu
)
A pronoun is a word that stands in for a noun (e.g. she).
1. (interrogative)
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)
a. quien
My father, who is 60 years old, won a tennis tournament.Mi padre, quien tiene 60 años, ganó un torneo de tenis.
b. que
My friend is the one who has a date tonight.Mi amigo es el que tiene una cita esta noche.
WHO
An abbreviation is the shortened form of a word or group of words (e.g. "UFO" = "unidentified flying object"; "p." = "page").
abbreviation
3. (World Health Organization)
a. OMS
Breast milk has many benefits. According to the WHO, exclusive breastfeeding is the best option during the first six months of life.La leche materna tiene muchos beneficios. Según la OMS, el amamantamiento exclusivo es la mejor opción durante los primeros seis meses de vida.
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why(
way
)
An adverb is a word that describes a verb, an adjective, or other adverbs (e.g. to run quickly, very tired).
1. (in questions)
a. por qué
Why are you crying?¿Por qué lloras?
A conjunction is a word that connects words, phrases, clauses, or sentences (e.g. The cat and the dog slept.).
2. (in relative clauses)
a. por qué
I don't know why she left me.No sé por qué me dejó.
A noun is a word referring to a person, animal, place, thing, feeling or idea (e.g. man, dog, house).
3. (explanation)
a. el porqué
(m) means that a noun is masculine. Spanish nouns have a gender, which is either feminine (like la mujer or la luna) or masculine (like el hombre or el sol).
Do you really want to know why?¿De verdad quieres saber el porqué?
An interjection is a short utterance that expresses emotion, hesitation, or protest (e.g. Wow!).
4. (well)
a. vaya
Why! Look who just arrived!¡Vaya! ¡Mira quién acaba de llegar!
b. anda
Why, surely you don't think Anna stole your ring!Anda, ¡no pensarás que Anna te robó el anillo!
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