The phrase "put line" refers to the act of laying down a boundary or guideline. The opposite of this action would be to remove or erase a line, or to ignore existing boundaries altogether. Antonyms for "put line" might include "blur line," "disregard boundary," "disregard guidelines," "cross boundary," "step over line," or "overstep boundary." These terms suggest a lack of respect for boundaries or an unwillingness to adhere to established rules. In contrast, "put line" implies a sense of order and structure, indicating a willingness to abide by certain rules or principles.