Antonyms for the phrase "dare-say" can include expressions such as "uncertain," "unsure," or "hesitant." These antonyms suggest a lack of confidence or conviction in one's opinions or beliefs. Other antonyms may include "disbelieve," "reject," "oppose," or "dissent." These words indicate a complete disagreement or refusal to accept something as true or correct. Overall, the antonyms for "dare-say" suggest a range of different attitudes and responses towards information, from skepticism and doubt to outright disagreement and disapproval.