忄是汉字部首，由“心”演变而来。称竖心旁或竖心。古代人认为心脏主管人的思想，故“忄”旁的字多与心理活动有关。
忄 is the radical of Chinese characters, which evolved from “心”. It is called the vertical heart or the vertical heart. Ancient people believed that the heart is in charge of human thoughts, so the words next to “忄” are mostly related to mental activities.
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