The old form suggests a heart; on the left it often becomes 忄.
Often relates to emotions, thoughts, desires, or mental states.
按笔顺练习部首、简体、繁体以及可用的异体形式。
xīn
heart; mind
xiǎng
to think; to want
máng
busy
The radical 心 has the very common left-side variant 忄.
What is the radical in the character 忙?