HSK C6
Correct

徒

/ tú / 
Strokes

Definition

disciple/apprentice/believer/on foot/bare or empty/to no avail/only/prison sentence

Example

As a Verb
be on foot
As a Noun
foot soldier; infantry; infantryman
As a Noun
disciple; pupil; apprentice
As a Noun
person; fellow
As a Noun
people of the same faction
As an Adjective
empty; bare
As an Adverb
[ tú ]
1
Bù
不
tú
徒
wúyì
无益
  
,
fǎnér
反而
yǒuhài
有害

not only useless, but harmful

2
Tú
徒
jù
具
xíngshì
形式

be a mere formality

3
Tú
徒
zì
自
jīngrǎo
惊扰

frighten oneself for no apparent reason; become needlessly alarmed

4
Tú
徒
fèi
费
xīnjī
心机

waste one's contrivances; scheme to no avail; rack one's brains in vain

As a Noun
prison sentence; imprisonment
As a Noun
believer/follower of a religion