| 透 | 
tòu dǐ | to disclose inside information / to divulge secret details | 
| 透 | 
tòu | (bound form) to penetrate; to seep through / to tell secretly; to leak / thoroughly; through and through / to appear; to show | 
|  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) |