The word "grut" is spelled with a hard G sound at the beginning and a U and T at the end. In IPA phonetic transcription, it is spelled /ɡrʌt/. This word is not commonly used in contemporary English, but historically it referred to a type of coarse grain mixture used in brewing beer. The spelling of "grut" comes from a Middle Dutch word, "gruut", which had a similar meaning. Today, the term is mostly used by beer enthusiasts and historians.
The word "grut" has its origins in Old High German. It can be traced back to the Old High German word "gruz" which meant "coarse meal" or "groats". Over time, it evolved to "grut" in Middle High German, referring to a mixture of herbs and spices used in brewing beer. It is believed that the term "grut" was borrowed into Middle English through its use in medieval brewing practices.