For what purpose, reason, or cause; with what intention, justification, or motive.
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1. The reason why he did it is complicated. (±×°¡ ±× ÁþÀ» ÇÑ ÀÌÀ¯´Â º¹ÀâÇÏ´Ù) 2. I see no reason why we should stay here. (¿ì¸®°¡ ÀÌ°÷¿¡ ¸Ó¹°·¯ ÀÖ¾î¾ß ÇÒ ÀÌÀ¯¸¦ ¸ð¸£°Ú´Ù) 3. Why were you absent from school yesterday? (¾îÁ¦ ¿Ö °á¼®À» Çß´Ï?) 4. Why don't you have dinner with me this evening? (¿À´Ã Àú³á ½Ä»ç¸¦ °°ÀÌ ÇÏ´Â °ÍÀÌ ¾î¶³±î¿ä) 5. I am not sure why it's so. (¿Ö ±×·±Áö ¾Ë ¼ö ¾ø´Ù)