The word "nerren" is a rare English term that is not commonly used. It is spelled as /ˈnɛrən/ in IPA phonetic transcription. This word is mostly known as a Scots word which means "to snarl" or "to growl". The root of the word is "nirr" which means "to snarl or mutter" in Scottish Gaelic. Although the word is not in significant usage nowadays, it is still considered a part of the Scottish dialect and can be found in some old literature.