Usage note
彻底表示完全、干净或没有保留。
chè dǐ biǎo shì wán quán 、 gān jìng huò méi yǒu bǎo liú。
彻底 means complete, thorough, or without reservation.
Context note
彻底常用于清理、改变和分析。
chè dǐ cháng yòng yú qīng lǐ 、 gǎi biàn hé fēn xī。
It is often used for cleaning, change, and analysis.
5 examples
请彻底检查。
qǐng chè dǐ jiǎn chá。
Please check thoroughly.
他彻底明白了。
tā chè dǐ míng bái le。
He completely understood.
我们要彻底解决问题。
wǒ men yào chè dǐ jiě jué wèn tí。
We need to solve the problem thoroughly.
房间已经彻底打扫了。
fáng jiān yǐ jīng chè dǐ dǎ sǎo le。
The room has been thoroughly cleaned.
这次彻底失败了。
zhè cì chè dǐ shī bài le。
This time it failed completely.
5 mini stories
老师要求大家彻底复习。
lǎo shī yāo qiú dà jiā chè dǐ fù xí。
The teacher asked everyone to review thoroughly.
他彻底改变了想法。
tā chè dǐ gǎi biàn le xiǎng fǎ。
He completely changed his mind.
这次清理得很彻底。
zhè cì qīng lǐ dé hěn chè dǐ。
This cleaning was very thorough.
问题要彻底解决，不能只看表面。
wèn tí yào chè dǐ jiě jué， bù néng zhī kàn biǎo miàn。
The problem must be solved thoroughly, not just on the surface.
她把房间彻底整理了一遍。
tā bǎ fáng jiān chè dǐ zhěng lǐ le yí biàn。
She thoroughly tidied the room once.
Mini dialogue
打扫房间
A
你的房间打扫干净了吗？
Nǐ de fángjiān dǎsǎo gānjìng le ma?
Did you clean your room?
B
是的，我彻底整理了一遍。
Shì de, wǒ chèdǐ zhěnglǐ le yī biàn.
Yes, I tidied it up thoroughly.
解决问题
A
这个问题有点难。
Zhège wèntí yǒudiǎn nán.
This problem is a bit difficult.
B
别担心，我们一起彻底解决它。
Bié dānxīn, wǒmen yīqǐ chèdǐ jiějué tā.
Don't worry, let's solve it thoroughly together.
Related words and contrasts
similar
完全
wán quán
completely
Both mean 'completely', but 彻底 often implies a deeper, more thorough process.
opposite
马虎
mǎ hu
careless
彻底 means doing something thoroughly, while 马虎 means doing it carelessly.