Acting, moving, or capable of acting or moving quickly; swift.
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fasten [µ¿] fastness [¸í]
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1. a door fast shut (²À ´ÝÇô ÀÖ´Â ¹®) 2. a fast horse (Áظ¶) 3. a fast train (±ÞÇà ¿Â÷) 4. My watch is five minutes fast. (³ªÀÇ ½Ã°è´Â 5ºÐ ºü¸£´Ù) 5. hold fast to a rail (³°£¿¡ ¸Å´Þ¸®´Ù)