Unsanctifiable means impossible to make or declare as sacred or holy. Its antonyms are words that mean the opposite, including words like sacred, holy, blessed, consecrated, and sanctified. These terms all imply an elevated status or an association with a higher power or spiritual significance. Other antonyms include righteous, moral, virtuous, pure, and ethical, which all suggest adherence to a moral code or set of standards. Conversely, antonyms for unsanctifiable can also include profane, impious, sacrilegious, and blasphemous, which convey a lack of respect or reverence for what is considered sacred or holy.