底[dǐ]

名

1. bottom; base

♦ 井~ the bottom of a well

2. the heart of a matter; ins and outs

♦ 交底

3. rough draft

4. a copy kept as a record

♦ 留个~儿 keep a copy on file; duplicate and file (a letter, etc.)

5. end of a year or month

♦ 年底

6. ground; background; foundation

♦ 白~红花 red flowers on a white background