why (EN)
adverbio, sustantivo, interjección

adverbio “why”

why
  1. por qué
    Why did you decide to become a teacher?
  2. por qué no
    Why don't you take a break?
  3. para qué
    Why worry about the rain when we can have fun indoors?
  4. por el cual (cuando se refiere a la razón de una afirmación)
    He asked why she was crying.

sustantivo “why”

sg. why, pl. whys or uncountable
  1. el motivo
    She always asked the whys behind her parents' rules, wanting to understand their reasoning.

interjección “why”

why
  1. una forma anticuada de expresar sorpresa, molestia o impaciencia
    Why, I had no idea you were coming today!