Translation

• lit. a notch on the side of a boat to locate a sword dropped overboard (idiom)
• fig. an action made pointless by changed circumstances

Synonyms

• 一板一眼, 不到黄河心不死, 不识抬举, 依样画葫芦, 划一不二, 刻板, 古板, 呆板, 固执己见, 姜太公钓鱼, 守株待兔, 拘于, 按图索骥, 板, 板板六十四, 死, 死心塌地, 死板, 死脑筋, 毒化, 率由旧章, 胶柱鼓瑟, 食古不化