Un-forced means that something is done naturally or without any pressure or coercion. Its antonyms may include words like forced, contrived, artificial, or unnatural. Forced means to be compelled to do something against one's will or to be coerced into doing something. Contrived refers to something that is deliberately created or planned, rather than occurring naturally. Artificial means something is created by human beings, often for a specific purpose, and it may not occur naturally. Lastly, unnatural means something that deviates from the natural order or is not part of the usual way things happen.