commutation [i k!mjut3i.qn | k(m` ]    (¼øÀ§: 14768 - ´ëÁ¹ ¼öÁØ)  
¶æ ¸í) ±³È¯, Àüȯ, ÁöºÒ ¹æ¹ýÀÇ º¯°æ, [¹ý] °¨Çü; °¨¸é
Mean A substitution, exchange, or interchange.
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