To be obliged or required by morality, law, or custom.
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1. I thought you must have lost your way. (´ç½ÅÀÌ Æ²¸²¾øÀÌ ±æÀ» ÀÒ¾úÀ» °ÍÀ̶ó°í ³ª´Â »ý°¢Çß´Ù) 2. That man must have stolen it! (±× »ç¶÷ÀÌ ±×°ÍÀ» ÈÉÃÆÀ½¿¡ Ʋ¸²¾ø´Ù) 3. Must I stay there? (Á¦°¡ °Å±â¿¡ ¸Ó¹°·¯¾ß¸¸ Çմϱî) 4. We must eat to live. (»ç¶÷Àº »ì±â À§ÇØ ¸Ô¾î¾ß ÇÑ´Ù) 5. What a sight it must have been! (Ʋ¸²¾øÀÌ Àå°üÀ̾úÀ» °ÍÀÌ´Ù)