Eth

For a list of letters that look similar to Ð in uppercase, see D with stroke (disambiguation). For other uses, see Eth (disambiguation).

Eth (/ɛð/, uppercase: Ð, lowercase: ð; also spelled edh or eð) is a letter used in Old English, Middle English, Icelandic, Faroese (in which it is called edd), and Elfdalian. It was also used in Scandinavia during the Middle Ages, but was subsequently replaced with dh and later d. It is transliterated to d (and d- is rarely used as a mnemonic). Its use has survived in Iceland and the Faroe Islands. The capital eth resembles a D with a line through the vertical stroke. The lower case resembles reversed 6 with a line through the top. The lower-case letter has been adopted to represent a voiced dental fricative in the International Phonetic Alphabet.

The letter originated in Irish writing as a d with a cross-stroke added. The lowercase version has retained the curved shape of a medieval scribe's d, which d itself in general has not.

In Icelandic, ð represents a (usually apical) voiced alveolar non-sibilant fricative [ð̠], similar to the th in English "the", but it never appears as the first letter of a word, where þ is used in its place. The name of the letter is pronounced [ɛθ̠]; i.e., voiceless, unless followed by a vowel.

In Faroese, ð is not assigned to any particular phoneme and appears mostly for etymological reasons; however, it does show where most of the Faroese glides are, and when the ð is before r it is, in a few words, pronounced [ɡ]. In the Icelandic and Faroese alphabets, ð follows d.

In Olav Jakobsen Høyem's version of Nynorsk based on Trøndersk, the ð was always silent and was introduced for etymological reasons.

In the orthography for Elfdalian, the ð represents a voiced dental fricative like th in English "them", and it follows d in the alphabet.

In Old English, ð (referred to as ðæt by the Anglo-Saxons) was used interchangeably with þ (thorn) to represent either voiced or voiceless dental fricatives. The letter ð was used throughout the Anglo-Saxon era, but gradually fell out of use in Middle English, practically disappearing altogether by 1300; þ survived longer, ultimately being replaced by the modern digraph th.

The ð is also used by some in written Welsh to represent the letter 'dd' (the voiced dental fricative).

Lower-case eth is used as a symbol in the International Phonetic Alphabet (IPA), again for a voiced dental fricative, and in IPA usage, the name of the symbol is pronounced with the same voiced sound, as /ɛð/. (The IPA symbol for the voiceless dental fricative is θ.)

A handwritten ð is visible.

Computer input

System	Uppercase	Lowercase	Notes
Compose key ("Multi Key")	Compose ⇧ Shift+D ⇧ Shift+H	Compose D H	Compose is a dead key meaning it is pressed & released rather than held down
Unicode	U+00D0	U+00F0	Inherited from the older ISO 8859-1 standard
HTML	Ð	ð
Unix-like	Compose key plus D and H	Compose key plus d and h	For ISO-8859-1- and UTF-8-based locales
Faroese keyboard	⇧ Shift+Ð	ð	Separate key for Ð
Icelandic keyboard layout	⇧ Shift+Ð	ð	Separate key for Ð (and Þ, Æ and Ö)
OS X	⇧ Shift+⌥ Option+D	⌥ Option+D	Typed by activating the US Extended keyboard layout
Microsoft Windows	Alt+(0208)	Alt+(0240)	AltGr+d with the US International keyboard layout

Miscellaneous

• The letter ð is sometimes used in mathematics and engineering textbooks as a symbol for a spin-weighted partial derivative. This operator gives rise to spin-weighted spherical harmonics.
• The modern Greek letter delta (Δ, δ) has, in general, the same phonetic value, and ð is the only Latin alphabet letter faithfully representing delta's phonetic value. (In Ancient Greek, delta represented a d sound.)
• Icelandic words cannot start with ð (sometimes used as a "play" on English such as the Icelandic band Ðe lónlí blú bojs i.e. The lonely blue boys).
• A capital eth is used as the currency symbol for Dogecoin.

See also

• Thorn
• "Ye" form of the English article "the"
• Ye Olde
• D with stroke
• African D
• Insular script
• Dogecoin
• Ethereum

Bibliography

• Ladefoged, Peter; Maddieson, Ian (1996). The Sounds of the World's Languages. Oxford: Blackwell. ISBN 0-631-19814-8. 
• Pétursson, Magnus (1971), "Étude de la réalisation des consonnes islandaises þ, ð, s, dans la prononciation d'un sujet islandais à partir de la radiocinématographie", Phonetica 33: 203–216, doi:10.1159/000259344 

External links

• "Thorn and eth: how to get them right", Operinan, Briem .
• "Alvdalsk ortografi", Förslag till en enhetlig stavning för älvdalska (PDF) (in Swedish), SE, March 2005 .