dǐ

ㄉㄧˇ

NHSK 4TOCFL L2core 10k

1bottom; base

2background; foundation

3copy (of a manuscript or receipt etc) kept as a record

4(suffix) end of a year or month

5(math.) radix; base (abbr. for 底數|底数[di3 shu4])

bǎ把zhè lǐ这里fān翻gè个dǐ底cháo朝tiān天！

把这里翻个底朝天！

Leave no stone unturned.