Inexorable is an adjective that describes something that is relentless and cannot be stopped or changed. Its antonym would be something that is stoppable, alterable or can be changed. Some words that come to mind that fit into the antonym category of 'inexorable' are flexible, yielding, adaptable, pliable, soft, susceptible, and compliant. These words suggest that the opposite of inexorable is something that can be influenced or molded, and most importantly, it is something that can be transformed through different means. It is important to use the appropriate antonyms of a word to create a balance in communication and delivery of ideas.