钻洞 | zuān dòng | to bore / to burrow / to crawl through a tunnel | |
钻 | zuān | to drill / to bore / to get into / to make one's way into / to enter (a hole) / to thread one's way through / to study intensively / to dig into / to curry favor for personal gain | |
锥 | zhuī | cone / awl / to bore | |
蛀 | zhù | termite / to bore (of insects) |