HSK C7-9
Correct

/ yú /
Strokes

Definition

to be stupid/to cheat or deceive/me or I (modest)

Example

As an Adjective
foolish; stupid
1
zhī
  
,
愚不可及
  

Others may equal his wisdom, but they cannot equal his stupidity.

2
ér
hǎo
yòng
自用

be stupid but wilful

As a Verb
make a fool of
As a Pronoun
my; I