Exigible means something that is capable of being demanded or required. Synonyms for exigible include payable, collectible, and owed. These synonyms represent the expectation of a debt or obligation that is due and must be fulfilled. Furthermore, other synonymous words for exigible could include enforceable, compulsory, or binding. These words all indicate that the situation has reached a level where the payment or demand must be met and cannot be ignored. In conclusion, exigible carries with it an implication of responsibility and obligation, and any word that is a synonym for this term embodies the same level of duty and expectation.