When we talk about antonyms for the phrase "most recurring," we need to look for words that denote the opposite of frequency or repetition. Some of the possible antonyms could be rare, infrequent, occasional, sporadic, or intermittent. Instead of "most recurring," we can use phrases such as "least recurring," "hardly recurring," or "occasionally recurring," depending on the context. For example, if we are talking about a medical condition, we might want to highlight that it is rare or infrequent. On the other hand, if we talk about a task or an event, we might use words like occasional or intermittent to reflect its irregularity or unpredictability.