The term "most gelid" is used to describe the very coldest or freezing conditions, often used in reference to weather or extreme cold temperatures. Antonyms for "most gelid" might include terms such as warm, hot, mild, balmy, or temperate. These terms refer to a range of temperatures that are much more comfortable for most people, without the hazards of ice or snow that can come with extremely cold weather. It's important to note that antonyms for "most gelid" may vary depending on context - for example, a balmy summer day might be an antonym for "most gelid" winter weather, but it might not be an antonym for a temperature range that is still quite chilly.