Four-flushed is a term that means fake or insincere, typically used to describe someone who is pretending to be something they are not. Some antonyms for four-flushed include genuine, authentic, sincere, real, and honest. These words represent characteristics that are opposite of someone who is four-flushed. A genuine person is truthful and sincere in their actions and can be trusted. An authentic person is true to themselves and others, and honest about their intentions. A sincere person is genuine in their feelings and beliefs, and is not deceptive or insincere. A real person is someone who is not fake or artificial, and an honest person is truthful and straightforward in their actions and words.