The antonyms for the phrase "gives notice" can vary depending on the context. In a legal setting, the opposite of giving notice would be to ignore or neglect the requirement to provide notice. In a relational or communicative setting, antonyms could include withholding information, keeping silent, or even concealing the truth. Alternatively, antonyms could be the opposite of notice itself, which might include acting spontaneously, reacting without prior communication, or simply failing to provide any indication of action. Ultimately, the antonyms for "gives notice" reflect a range of behaviors and attitudes that differ from the clarity and transparency that notice typically represents.