Words that have an active life in the singular, e.g., conundrum, will be treated as English words and will eventually be given English plural forms. Others, such as data, that are rarely, if ever, heard in the singular, or which have a significantly different meaning in the singular, such as medium/media will be treated as a group singular in the plural form and have an English plural for the singular form's meaning. One, opera, which has taken on a specialized meaning, has become so divorced from the singular (opus) that it has its own plural, operas.