Riddlingly is a word that means something is unclear or mysterious. There are several other synonyms that you can use to substitute riddlingly. One of these is enigmatically, which denotes that something is difficult to understand or interpret. Another synonym is cryptically, which implies that there is a hidden meaning that needs decoding to get the message. Puzzlingly can also be an excellent alternative since it means there is something that is not easy to comprehend or unravel. Another synonym that can be useful is mystifyingly, which implies that there is a sense of wonder or awe that is hard to explain. All these synonyms provide a more precise understanding of what riddlingly means.