Meaning of dǐ:
底
end (of the month, year etc); remnants; (math.) radix; base; background; bottom; base
Měinián dào shí'èr yuè dǐ, rénmen dūhuì qìngzhù xīnnián.
每年到十二月底，人们都会庆祝新年。
Every year at the end of December, people celebrate the New Year.
Tā chī wán fàn hòu, bǎ suǒyǒu de dǐ qīnglǐ gānjìng.
他吃完饭后，把所有的底清理干净。
After finishing his meal, he cleaned up all the remnants.
Huàn chéng èr jìn zhì yǐhòu, dǐ shù shì èr.
换成二进制以后，底数是2。
After converting to binary, the radix is 2.
Shān de dǐ bù fēicháng wěngù.
山的底部非常稳固。
The base of the mountain is very stable.
Zhè fú huà de dǐsè shì lán sè de.
这幅画的底色是蓝色的。
The background color of this painting is blue.
Tā zhàn zài shān de dǐ.
他站在山的底。
He stands at the bottom of the mountain.
Fángzi de dǐbù hěn jiāngù.
房子的底部很坚固。
The base of the house is very sturdy.
(equivalent to 的 as possessive particle)
Zhè gè hézi dǐ yǒu yī gè quēkǒu.
这个盒子底有一个缺口。
There is a notch at the bottom of this box.
