hit a brick wall 點解?

brick wall = a point or level that it is very difficult to go past:

If you hit a brick wall or come up against a brick wall, you are unable to continue or make progress because something stops you.

hit a brick wall = 沒有進展, 因為有障礙

The housing market declined as the boom in prices hit a brick wall.

It felt like I was hitting my head against a brick wall because I had no support from my boss.

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hit a brick wall= 擊中磚牆

she is hitting a brick wall with companies refusing to hire her because of her gender." hitting a brick wall"
她是創下了磚牆與公司拒絕僱用她，因為她的性別。“擊中磚牆"

應該係「以身犯險」，或「挑戰」。