N4 — outside your level filter

〜な

〜なnaN4casual

savor + don't do it — a bare order, with nothing softening it

ajiwau na

don't do it — a bare order, with nothing softening it

meaning: don't savor

人ひとの日記にっき、勝手かってに味あじわうなよ。

hito no nikki, katte ni ajiwau na yo.

Hey, don't savor someone's diary without asking. casual

立入たちいり禁止きんしの柵さくに、「近寄ちかよるな」とだけ書かかれていた。

tachiiri kinshi no saku ni, chikayoru na to dake kakarete ita.

On the barrier fence there was nothing but KEEP AWAY. neutral

All examples8

a bare order not to — blunt, top-down or between close friends, male-coded

人ひとの日記にっき、勝手かってに読よむなよ。
hito no nikki, katte ni yomu na yo.
Hey, don't read someone's diary without asking. casual
おい、ふざけるな。
oi, fuzakeru na.
Hey — knock it off. casual

warnings, hazard signs and shouted cautions — danger excuses it for anyone

立入たちいり禁止きんしの柵さくに、「近寄ちかよるな」とだけ書かかれていた。
tachiiri kinshi no saku ni, chikayoru na to dake kakarete ita.
On the barrier fence there was nothing but KEEP AWAY. neutral
危あぶない、ここを走はしるな！
abunai, koko o hashiru na !
Careful! don't run here! casual
危あぶない、動うごくな！
abunai, ugoku na!
Careful — don't move! casual

don't worry about it — a caring use, reading as warmth, not force

あんまり無理むりするなよ。
anmari muri suru na yo.
Don't go pushing yourself too hard. casual
心配しんぱいするな、俺おれがなんとかする。
shinpai suru na, ore ga nantoka suru.
Don't worry — I'll sort it out somehow. casual

quoted inside a report — the normal way to relay a ban secondhand

監督かんとくに、絶対ぜったいに無理むりをするなと言いわれた。
kantoku ni, zettai ni muri o suru na to iwareta.
The coach told me not to push myself under any circumstances. neutral

なよnayocolloquial
味あじわうなよ
よ makes the ban personal — 言いうなよ pleads or nags where plain 言いうな just forbids.

来くるな uses the plain form, so it still forbids. There's no polite version,
so upward it's ないでください instead.