mnþs

Mnþs, also known as eth, is a letter that was used in Old English and Middle English. It is a ligature of the letters 'n' and 'þ' (thorn), and represents the voiced dental fricative sound, like the 'th' in "this". The letter was primarily used at the end of words, often in the plural form of nouns. For example, the Old English word for "month" was mōnaþ, and its plural was mōnaþas. The letter mnþs would appear in words like "þurhþanþs", meaning "through things".

The use of mnþs declined with the Norman Conquest of 1066, as French scribal traditions became more influential. While thorn (þ) continued to be used for a time, mnþs itself fell out of common usage. It is a rare and specialized character, primarily of historical linguistic interest. Its presence highlights the distinct phonetic and orthographic features of early Germanic languages. The character's form is often depicted as a lowercase 'n' with a small 'þ' attached to its ascender. It is not part of the modern English alphabet.