Antonyms for the phrase "daring not" would encompass words and phrases relating to courage, bravery, confidence, and boldness. Words like "fearless," "audacious," "bold," "brave," "confident," "daring," and "gutsy" would all be antonyms for this phrase. "Hesitant," "timid," "fearful," "nervous," "terrified," "faint-hearted," and "cowardly" would also be antonyms, as they describe the opposite of being daring or courageous. When used appropriately, antonyms can help to provide context and clarity and can make writing more effective by adding depth and complexity to the language used.