The antonyms for the phrase "being one duty to" could vary depending on the context in which it is used. However, some possible antonyms could include neglecting, avoiding, ignoring, disregarding, disobeying, abandoning, shirking or ignoring one's duty. These terms signify the opposite of fulfilling or carrying out one's responsibilities or obligations. When we neglect or avoid our duties, we risk letting down others who rely on us, and we can also cause harm to ourselves. Therefore, it is important to be aware of our responsibilities and act accordingly to avoid the negative consequences that might arise from neglecting them.