小洞不堵，大洞受苦

A small hole not plugged will make you suffer a big hole (idiom); A stitch in time saves nine.

no; not so / (bound form) not; un-

see 大夫[dai4 fu5]

big; large; great / older (than another person) / eldest (as in 大姐[da4 jie3]) / greatly; freely; fully / (dialect) father / (dialect) uncle (father's brother)

small / tiny / few / young

to receive / to accept / to suffer / subjected to / to bear / to stand / pleasant / (passive marker)

cave / hole / zero (unambiguous spoken form when spelling out numbers) / CL:個|个[ge4]

bitter / hardship / pain / to suffer / to bring suffering to / painstakingly

to block up (a road, pipe etc) / to stop up (a hole) / (fig.) (of a person) choked up with anxiety or stress / wall (literary) / (classifier for walls)

to suffer hardship