HSK C4
Correct

默

/ mò / 
Strokes

Definition

silent/to write from memory

Example

As a Verb
be silent/tacit/quiet
1
Mòbùzuōshēng
默不作声

keep silent; keep silence (on sth)

As a Verb
write from memory
2
Mòkèwén
默课文

write out the text from memory