Kangaroo word a word that contains its antonym; for example: "covert" carries "overt", "animosity" carries "amity". Some compilers require that the letters of the joey word not be consecutive within the kangaroo word, or that the kangaroo and joey words must be etymologically unrelated. Kangaroo words were originally popularized as a word game by Ben O'Dell in an article for "The American Magazine", volume 151, during the 1950s. This was later reprinted in "the Reader's Digest". Kangaroo word A kangaroo word is a word that contains letters of another word, in order, with the same meaning. For example: the word "masculine" contains
Eureka (word) Fermat polygonal number theorem. Eureka (word) Eureka () is an interjection used to celebrate a discovery or invention. It is a transliteration of an exclamation attributed to Ancient Greek mathematician and inventor Archimedes. "Eureka" comes from the Ancient Greek word "heúrēka", meaning "I found (it)", which is the first person singular perfect indicative active of the verb "heuriskō" "I find". It is closely related to heuristic, which refers to experience-based techniques for problem solving, learning, and discovery. The accent of the English word is on the second syllable, following Latin rules of accent, which require that a penult (next-to-last syllable)