闯 (chuǎng): This character is a fantastic example of pictographic storytelling. It's composed of 门 (mén), meaning “door” or “gate,” with a 马 (mǎ), meaning “horse,” inside. Imagine a horse bursting through a gate—it's fast, forceful, and unstoppable. This character on its own means to charge, to rush, or to brave (as in, to venture into a new territory).
入 (rù): This simple character means “to enter” or “to go in.” It looks like a wedge or an arrow pointing downwards and inwards, graphically representing the act of entry.
When you combine the forceful “charging” of 闯 (chuǎng) with the simple action of “entering” 入 (rù), you get a word that means to enter by force, to barge in, or to trespass. The force and lack of permission come from 闯, while 入 specifies the action.