Correct

退化

/ tuìhuà /
Strokes

Definition

to degenerate/atrophy

Example

As a Verb

degenerate; retrograde; retrogress; degrade

1
Zhí
植物
de
jiù
shì
tuìhuà
退化
de
zhī
  

Thorns are aborted branches.

2
néng
机能
tuìhuà
退化

functional retrogradation

As a Verb

deteriorate; worsen

3
Shèhuì
社会
fēng
风气
tuìhuà
退化

degrading social morals