| 底 |
dǐ céng | ground floor; first floor / lowest level; lowest rung (of society etc) |
| 底 |
de | (equivalent to 的 as possessive particle) |
| 底 |
dǐ | bottom; base / background; foundation / copy (of a manuscript or receipt etc) kept as a record / (suffix) end of a year or month / (math.) radix; base (abbr. for 底数) |
| 层 |
céng | to pile on top of one another / layer; stratum / floor (of a building); story / (math.) sheaf / classifier for layers |