isogrammi

An isogram is a word or phrase without a repeating letter, historically used in cryptography and coding. The term originates from the Greek words "isos," meaning "equal," and "gramma," meaning "letter." Isograms are particularly useful in creating ciphers and codes because they eliminate the possibility of repeated letters, making them more secure. In modern times, isograms are also used in word games and puzzles to challenge players' linguistic skills. The concept can be extended to phrases, where no letter repeats, making them even more challenging to create. Isograms are not limited to the English language and can be found in various languages around the world. Despite their historical significance, isograms continue to be a popular topic in recreational mathematics and wordplay.