Eth

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 often transliterated as d. The lowercase version has been adopted to represent a voiced dental fricative in the International Phonetic Alphabet.

For other uses, see Eth (disambiguation).

"Edh" redirects here. For other uses, see Edh (disambiguation).

"Ð" redirects here. For the cryptocurrency, see Dogecoin. For letters that look similar to Ð, see D with stroke.

Ð
Ð ð
(See below)
Usage
Writing system	Latin script
Type	Alphabetic and Logographic
Language of origin	Old English language Old Norse language
Phonetic usage	[ð] [θ] [ð̠] /ˈɛð/
Unicode value	U+00D0, U+00F0
History
Development	Δ δ 𐌃 D d Ð ð
Time period	~800 to present
Descendants	None
Sisters	None
Transliteration equivalents	d
Variations	(See below)
Other
Other letters commonly used with	th, dh

Eth in Arial and Times New Roman

In Old English, ð (called ðæt by the Anglo-Saxons[1]) was used interchangeably with þ to represent the Old English dental fricative phoneme /θ/ or its allophone /ð/, which exist in modern English phonology as the voiced and voiceless dental fricatives now spelled "th".

Unlike the runic letter þ, ð is a modified Roman letter. ð was not found in the earliest records of Old English. A study of Mercian royal diplomas found that ð (along with đ) began to emerge in the early 8th century, with ð becoming strongly preferred by the 780s.[2] Another source indicates that the letter is "derived from Irish writing".[3]

The lowercase version has retained the curved shape of a medieval scribe's d, which d itself in general has not. ð was used throughout the Anglo-Saxon era but gradually fell out of use in Middle English, practically disappearing altogether by 1300;[4] þ survived longer, ultimately being replaced by the digraph th.

A sample of Icelandic handwriting with some instances of lowercase ð clearly visible: in the words Borðum, við and niður. Also visible is a thorn in the word því.

In Icelandic, ð represents a voiced dental fricative [ð], which is the same as the th in English that, but it never appears as the first letter of a word, where þ is used in its stead. The name of the letter is pronounced in isolation (and before words beginning with a voiceless consonant) as [ɛθ̠] and therefore with a voiceless rather than voiced fricative.

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; when ð appears 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, ð was always silent and was introduced for etymological reasons.

Ð has also been used by some in written Welsh to represent /ð/, which is normally represented as dd.[5]

U+1D9E ᶞ MODIFIER LETTER SMALL ETH is used in phonetic transcription.[6]

U+1D06 ᴆ LATIN LETTER SMALL CAPITAL ETH is used in the Uralic Phonetic Alphabet.[7]

Computer input

The Faroese and Icelandic keyboard layouts have a dedicated button for eth.

On Microsoft Windows, eth can be typed using the alt code Alt+(0240) for lowercase or Alt+(0208) for uppercase, or by typing AltGr+d using the US International keyboard layout.

On macOS, eth can be typed by activating the ABC Extended keyboard layout and typing ⌥ Option+D.

Using the compose key ("multi key") which is popular on Linux, eth can be typed by typing Compose D H for lowercase or Compose ⇧ Shift+D ⇧ Shift+H for capital letters.

On Chrome OS, holding Alt Gr and pressing the D key will result in ð being written. Holding shift or putting Caps Lock on will result in Ð.

Other

System	Uppercase	Lowercase
Unicode	U+00D0	U+00F0
HTML	Ð	ð
TeX/LaTeX	\DH	\dh
GTK+	Ctrl+⇧ Shift+U D0 ↵ Enter	Ctrl+⇧ Shift+U F0 ↵ Enter
Vim[8]	Ctrl+K ⇧ Shift+D -	Ctrl+K D -

Modern uses

• 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.
• A capital eth is used as the currency symbol for Dogecoin.[9]

See also

• Thorn
• D with stroke
• African D
• Insular script

References

1. Marsden, Richard (2004). The Cambridge Old English Reader. Cambridge University Press. p. xxix.
2. Shaw, Philip (2013). "Adapting the Roman alphabet for writing Old English: evidence from coin epigraphy and single-sheet charters". Early Medieval Europe. 21 (2): 115–139. doi:10.1111/emed.12012.
3. Freeborn, Dennis (1992). From Old English to Standard English. London: Macmillan. p. 24. ISBN 9780776604695.
4. David Wilton (September 30, 2007). "Old English Alphabet". Word origins. Retrieved 22 August 2010.
5. Testament Newydd (1567) [The 1567 New Testament].
6. Constable, Peter (2004-04-19). "L2/04-132 Proposal to add additional phonetic characters to the UCS" (PDF).
7. Everson, Michael; et al. (2002-03-20). "L2/02-141: Uralic Phonetic Alphabet characters for the UCS" (PDF).
8. "Vim documentation: digraph".
9. "README.md". Dogecoin Integration/Staging Tree (Source code). February 5, 2014. Retrieved 17 February 2014.

Further reading

• Ladefoged, Peter; Maddieson, Ian (1996). The Sounds of the World's Languages. Oxford: Blackwell. ISBN 978-0-631-19815-4.
• 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" [Study of the realisation of Icelandic consonants þ, ð, s, in the pronunciation of an Icelandic subject from radiocinematography], Phonetica, 33 (4): 203–216, doi:10.1159/000259344

External links

• "Thorn and eth: how to get them right", Operinan, Briem, archived from the original on 2019-07-26, retrieved 2010-08-22
• "Älvdalsk ortografi", Förslag till en enhetlig stavning för älvdalska (PDF) (in Swedish), February 2007, archived from the original on February 6, 2007CS1 maint: unfit url (link).