Antonyms for the word "most participating" could include phrases such as "least involved," "uninvolved," or "unengaged." These terms indicate a lack of participation, interest, or enthusiasm in a particular activity or cause. Other antonyms could include words like "passive," "unresponsive," or "indifferent," which suggest a lack of action or involvement altogether. Alternatively, words like "disinterested" or "apathetic" indicate a lack of concern or caring, whereas "opposed" or "against" suggest a actively opposed stance towards the activity or cause in question. Ultimately, the antonyms for "most participating" reflect a range of attitudes and perspectives that may limit or inhibit engagement and participation.