adj.潜行的;
v.在某物下挖洞或挖通道( undermine的过去式和过去分词 );侵蚀…的基础;暗中破坏;逐渐削弱;
例句:
The soldiers undermined the wall.
士兵们在墙下挖洞.
The waters undermined the great wall round the Imperial Hunting Park.
洪水侵蚀了禁园的墙基.
At last the base of the cliff is undermined.
岩壁的下壁终于被掘空.