fēng​diān

insane

疯癫 (瘋癲) fēng​diān
insane verb
suffering from mental derangement or a chronic mental disorder

Due to a huge mental blow, he has been insane ever since.

wild verb
behaving in an unrestrained, boisterous, or eccentric manner

The group of children were frolicking wildly in the yard, playing until they were dripping with sweat.

Frequency

Movie subtitles
1.79 per million appears in 1% of films
Written text
1.49 per million

Sources

Definitions
CC-CEDICT