The word "end rainbow" is spelled phonetically as /ɛnd ˈreɪnboʊ/. The first syllable "end" is pronounced with the short "e" sound like the word "pen". The second syllable "rainbow" is pronounced with a long "a" sound like the word "main" and a stress on the first syllable. The letter "w" in "rainbow" is silent, and the final letter "o" is pronounced with a long "o" sound like the word "go". Together, the two words represent the endpoint of a rainbow, where it appears to touch the ground.
"End rainbow" is a term used to refer to a phenomenon that occurs when a complete or full rainbow is visible. In the natural world, a rainbow is formed by the dispersion of sunlight by water droplets in the air, creating a spectrum of colors. It appears as a circular arc of various hues, most commonly seven colors: red, orange, yellow, green, blue, indigo, and violet. When observing a rainbow, one can usually see only a portion of its entire circular shape, as the other part is obstructed from view. However, if one is situated at a vantage point high enough or viewing from an airplane, it is possible to see the entire circle of the rainbow.
The term "end rainbow" is used to describe the visual effect when one is positioned in a way that allows them to see both endpoints of the circular rainbow arc. This can be a rare occurrence as it requires specific conditions, such as the right angle of sunlight and the viewer's position, to align perfectly. The sight of an end rainbow is often considered awe-inspiring and magical, as it presents a complete and unbroken circle of vibrant colors stretching across the sky.
The term "end rainbow" is not a commonly used or recognized term, and it does not have a specific etymology. The word "end" in English comes from the Old English word "endian", which means "to come to an end" or "to finish". The word "rainbow" comes from the Old English term "regnbeog", which literally means "rain bow". However, it is unclear what "end rainbow" refers to in this context.