What is another word for unbounded interval?
Pronunciation: [ʌnbˈa͡ʊndɪd ˈɪntəvə͡l] (IPA) 
An unbounded interval refers to an interval of real numbers that extends infinitely in both directions. Synonyms for this term may include "infinite interval," "unlimited interval," or "unrestricted interval." Similarly, the term "open interval" may be used to describe an unbounded interval that does not include its endpoints. Another synonym for an unbounded interval may be "ray," which is a mathematical concept that refers to a line segment extending infinitely in one direction from a starting point. Whichever term is used, the foundation of each is the idea of a continuous set of real numbers that extend infinitely in one or both directions.
