The phrase 'starve oneself' is often used to refer to a harmful act of intentionally not eating enough food, which can lead to serious health consequences. However, there are many other synonyms that can be used to express the same idea. Some examples include 'deprive oneself of food', 'go on a hunger strike', 'fast', 'restrict food intake', 'under-eat', 'limit caloric intake', and 'crash diet'. While some of these phrases may not necessarily have negative connotations, they still convey the message of not consuming enough food, which can be harmful both physically and mentally. It is important to recognize the dangers of these behaviors and promote healthy eating habits.