There is a very common word in Latin that literally means "two and a half": sestertium, -i.
What is the Latin prefix for half?
Semi- is a prefix that means half, partially or almost. Semi- may also mean something that occurs twice within a specific amount of time. The prefix semi- is derived from the Latin semi- which means half. Most often, English words are constructed from words and word roots within the same foundation language.
What is the Latin prefix for two?
Quick Summary. The English prefixes bi-, derived from Latin, and its Greek variant di- both mean “two.” The Latin prefix is far more prevalent in common words, such as bilingual, biceps, and biped; the more technical Greek di- appears in such words as diphthong and dilemma.
What is the prefix for 3?
The English prefix tri-, derived from both Greek and Latin, means “three.” Some common English vocabulary words that contain this prefix include triathlon, trio, and triangle.