The meaning of "why" in Hindi is mainly "क्यों" (Kyon) or "किसलिए" (Kisliye). It is used to ask about the reason, cause, or purpose of something. The word "why" is an adverb used in questions to seek an explanation or justification for an action, event, or situation. In Hindi, it is commonly used to inquire about the cause or reason behind something. For example:

• Why did you choose that color? — आपने वह रंग क्यों चुना?
• Why is the sky blue? — आकाश नीला क्यों है?
• Why are you late? — तुम देरी क्यों हुई?

Thus, "why" in Hindi means "क्यों" or "किसलिए," used to ask for reasons or causes.