The word "unobliged" means not required or obliged to do something. Antonyms for this word would include "obliged", "committed", "bound", "duty-bound", "responsible", and "obligated". Each of these words carries the meaning of having a duty or obligation to fulfill a certain task or responsibility. For instance, if someone is obliged to attend a meeting, they are required to do so. Likewise, if someone is committed to a project, they have a responsibility to see it through to the end. Therefore, it can be said that antonyms for "unobliged" refer to the sense of duty or obligation that is absent when one is unobliged.