The term "un-block" primarily refers to the action of removing an obstruction or barrier, making way for free movement or progress. Some synonyms for "un-block" include "clear," "free," "open up," "untangle," "disentangle," "unjam," "liberate," "release," "unfetter," "unshackle," and "unlock." Depending on the context, these words can be effectively used in place of "un-block." For instance, one can say, "I cleared the path to the door," which means the same as "I un-blocked the path to the door." Using synonyms can make statements sound more lively, interesting, and descriptive.