快速 kuàisù fast
fast; high-speed; rapid
How to remember 快速: 快 quick + 速 prompt = fast.
Characters
How it is used
- Formal, written-register adjective meaning fast/high-speed, usually modifying an abstract or technical noun: 快速发展 (kuàisù fāzhǎn) rapid development, 快速反应 (kuàisù fǎnyìng) quick response.
- Simple 快 (kuài) is the everyday word for 'fast' in casual speech (开快点儿, drive faster); 快速 sounds more like news or business writing.
- Rarely stands alone as a predicate - it almost always precedes a noun or verb.
Example sentences
- 我被他英语的快速进步惊呆了。 Wǒ bèi tā yīngyǔ de kuàisù jìnbù jīngdāi le.I'm amazed at his rapid progress in English.