As a noun, understanding is knowing how something works or what it means, and it can also mean sympathy toward other people’s feelings. As an adjective, it describes someone who is kind and patient about others’ mistakes or problems.
From Old English "understandan," literally "to stand among or between," suggesting standing in the middle of ideas. Over time, it came to mean mentally grasping or comprehending something.
The old image behind "understand" is of standing in the middle of something, not beneath it—like being inside an idea instead of just looking at it. That’s why we talk about "deep understanding" when we feel surrounded by how something works.
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