The word "sacchariferous" is used to describe something that is filled with or containing sugar. Antonyms or opposite of this word include "unsweetened," "insipid," "bland," "sour," "unflavored," and "unpalatable." Unsweetened refers to something that is not sweet or lacks the presence of sugar. Insipid indicates a lack of taste, flavor, or interest. Bland refers to something that is dull or lacking in taste, while Sour means that it is acidic or sharp-tasting. Unflavored refers to something that has no taste or flavor, while Unpalatable means that it is unpleasant to taste or swallow.