Merriam-Webster's Word of the Day for September 29, 2025, is "obliterate." It means to destroy something completely, leaving no trace. The word can also signify removing something entirely from memory or recognition. For instance, a wave can obliterate a sandcastle, and a snowstorm can obliterate hopes. Historically, "obliterate" first emerged in the mid-16th century to describe erasing things from memory. Subsequently, its meaning expanded to cover blotting out written words. Over time, the word generalized to encompass the complete removal of anything from existence. Physicians also adopted "obliterate" to describe the surgical closure of bodily passages. A more recent usage involves canceling postage stamps. Today, "obliterate" continues to be used in its various senses.