bù​jiǎn​dān

complicated

不简单 (不簡單) bù​jiǎn​dān
complicated adverb
not simple; rather complex or involved

The background behind this matter is quite complex.

remarkable adverb
extraordinary; marvelous; showing impressive talent or ability

It is quite impressive that he could achieve such success at such a young age.

Frequency

Written text
4.33 per million

Sources

Definitions
CC-CEDICT
Frequency data
BCC Corpus (BLCU)