There are several synonyms for the phrase "were one's obligation." These include responsibilities, duties, commitments, obligations, mandates, tasks, assignments, roles, and functions. Each of these words describes a sense of obligation or duty that an individual must fulfill, whether due to a social contract, legal obligation, or simple moral imperative. A responsibility is a specific task or duty that one is expected to fulfill, while a mandate is an authoritative command or order. Tasks and assignments refer to specific projects or missions, and roles and functions denote the overall responsibilities one has within a particular context or organization. Whatever the exact phrasing, all of these words suggest a sense of obligation and duty that one must take seriously.