The truth behind a matter; the underlying details or background information

The lowest part of an object or body of water; base; foundation

(literary) to arrive at; to reach; to end up with

The final stage or concluding period of a month or year

A rough draft or a copy kept for record-keeping purposes

The background color or surface that patterns are set against

(math.) the base of a number system or a logarithm; short for 底数 dǐ​shù

An older written form of 的 de used to connect a describing word to the noun it describes; common in literature from the early 20th century

(archaic) an interrogative word used to mean 'what'

a Chinese surname