не плавай

don't swim

→ не
phrase Uncommon #19,416
don't swim Informal singular command; use не плавайте when addressing multiple people or someone politely.
RU: Не плавай здесь — вода слишком холодная.
EN: Don't swim here—the water is too cold.

Далеко не плавай!

Don't swim too far!

Не плавай в пруду.

Don't swim in the pond.

Не плавай здесь.

Don't swim here.