don't doUsed to tell someone not to do something. It is usually followed by the action or result to avoid, such as อย่าทำหาย (“don't lose it”) or อย่าทำเลอะ (“don't make it dirty”).
don't doA negative imperative meaning “don't do [something].” The object or action can follow the phrase; in some contexts, it can mean “don't hurt” or “don't do something to” someone.