打破砂锅问到底

1. • to go to the bottom of things (idiom)

Character by character

• 打(dǎ)a semantically light, transitive verb that is combined with various grammatical objects to form compound verbs and verb-object phrases with a diverse range of meanings
• 破(pò)broken
• 砂(shā)sand
• 锅(guō)pot
• 问(wèn)ask
• 到(dào)reach
• 底(dǐ)bottom