書くな

don't write

→ 書く
書く to write + な Imperative or prohibitive marker
verb · informal Rare #44,796
don't write A blunt, direct command; it can sound harsh.
JA: ここに名前を書くな。
EN: Don't write your name here.
Conjugation of 書く

ただここでは余計な事を書くな

Just don't write anything unnecessary here.

— Article 15 (2019)

作り話は書くなよ

Don't make things up.

— es[エス] (2001)

幸運を書くなと言ったろ?

I told you not to write “good luck,” didn’t I?

— マルコムX (1992)