Like some obligations is a phrase that can refer to a variety of different situations. The crossword solutions PRIOR, ASSUMABLE, and UNMET are all related to this phrase. PRIOR refers to something that happened or existed before something else, and in this context could refer to an obligation that was already in place before another situation arose. ASSUMABLE means that something can be taken on or accepted, and in this context could refer to an obligation that someone has the option to take on. UNMET refers to something that has not been fulfilled or achieved, and in this context could refer to an obligation that has not yet been completed.