HSK 6 HSK V6
Correct

足以

/ zúyǐ / 
Strokes

Definition

sufficient to.../so much so that/so that

Example

As an Adverb

enough; sufficiently

1
Zhèxiē
这些
shìshí
事实
zúyǐ
足以
shuōmíng
说明
wèntí
问题
  
。

These facts can adequately prove my point.

2
Bù
不
shā
杀
bùzúyǐ
不足以
píngmínfèn
平民愤
  
。

Only execution could assuage popular indignation.