Fore-known means having prior knowledge or information about something. The antonyms for fore-known can be words like unaware, uninformed, ignorant or clueless. When something is not fore-known, it is not anticipated or expected. It can be a surprise or a shock. Unpredictability, uncertainty, or unexpectedness can be other antonyms for fore-known. These words signify the absence of hereafter awareness or foresight. For example, a sudden and unforeseen change in plans can leave one feeling bewildered and disoriented. Thus, antonyms for fore-known can be critical when dealing with new situations, unexpected events or when making quick decisions.