Underruff is a word that refers to the layer of ice and snow that accumulates under a layer of newly fallen snow. The spelling of the word is unique, with the prefix "under" combined with the word "ruff", which means a thick layer of snow or ice. The pronunciation of the word can be represented phonetically as ʌndərʌf, with the stressed syllable being the first syllable "un". The word is not commonly used in everyday conversation, but is occasionally used in discussions related to winter weather and skiing.