(diān) — crazy, insane (formal, medical, or literary)

Definition

Formal, often medical or literary word for 'mentally deranged.' Stronger and more clinical than colloquial 疯.

adjective
crazyinsane (formal, medical, or literary)

Examples

  • Tā zuì jìn xíng wéi yǒu xiē fēng diān.
    He's been acting a bit crazy lately.
  • Tā tū rán biàn de hěn fēng diān.
    She suddenly became very crazy.
  • Tā nǎo zi yǒu diǎn fēng diān le.
    His mind has become a bit deranged.

Origin

Sound + meaning
六书liùshū
形声xíngshēng

Most characters — around four in five — are built this way: one part hints at the meaning, the other at the pronunciation.

This origin belongs to the traditional form 癲; 癫 is its simplified writing.

Meaning part形符xíngfú
illness
Sound part声符shēngfú
diāndiān
Same sound today

The traditional form 癲 uses 疒 (illness) for meaning and 顛 for sound; the simplified 癫 is a later shorthand.

Appears in

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