| 根 |
gēn dǐ | foundation / grounding / background / what lies at the bottom of sth / root / cause |
| 根 |
gēn | root / basis / classifier for long slender objects, e.g. cigarettes, guitar strings / CL:条 / radical (chemistry) |
| 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) |