Separable word"碰" and "壁" can be combined as one word, or be used separately with other elements inserted.我也是踫了好几次壁,才找到人解决。
I also met with several refusals before I found someone to solve the problem.
拓展市场,碰几次壁不足为怪。
It is no surprise to meet with several refusals during the market expansion.
你找工作碰过壁吗?
Have you ever been rebuffed when finding a job?