"Pentakis-" is a Greek prefix meaning five times. It is commonly used in scientific terms, particularly in chemistry and mathematics. Some synonyms for "pentakis-" include quintuply-, quinque-, fifth times-, and fiveply-. These prefixes are used interchangeably to indicate that the number being described is multiplied by five. For instance, the term "pentakis-phosphate" describes a molecule that contains five phosphate groups, while "quintuply-bonded" suggests that five bonds are holding the molecules together. Understanding the meaning of these synonyms is important for those in fields that use scientific terminology as they can be used in a variety of contexts.