K

K, or k, is the eleventh letter of the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide.

Its name in English is kay (pronounced /ˈk/), plural kays.

K
K k
Usage
Writing systemLatin script
TypeAlphabetic and Logographic
Language of originLatin language
Phonetic usage[k]
[]
[]
[ɡ]
/k/
Unicode codepointU+004B, U+006B
Alphabetical position11
History
Development
Time period~-700 to present
Descendants • K
 •
 •
SistersК
כ
ך
ک
ك
ܟ


𐎋

Կ կ
Հ հ
Խ խ
Other
Other letters commonly used withk(x)
Writing directionLeft-to-Right
This article contains phonetic transcriptions in the International Phonetic Alphabet (IPA). For an introductory guide on IPA symbols, see Help:IPA. For the distinction between [ ], / / and  , see IPA § Brackets and transcription delimiters.

The letter K usually represents the voiceless velar plosive.

History

Egyptian
hieroglyph
D
Proto-Sinaitic
K
Proto-Canaanite
kap
Phoenician
kaph
Western Greek
Kappa
Etruscan
K
Latin
K
d
K  K  K  K  K  K 

The letter K comes from the Greek letter Κ (kappa), which was taken from the Semitic kaph, the symbol for an open hand. This, in turn, was likely adapted by Semitic tribes who had lived in Egypt from the hieroglyph for "hand" representing /ḏ/ in the Egyptian word for hand, ⟨ḏ-r-t⟩ (likely pronounced /ˈcʼaːɾat/ in Old Egyptian). The Semites evidently assigned it the sound value /k/ instead, because their word for hand started with that sound.

K was brought into the Latin alphabet with the name ka /kaː/ to differentiate it from C, named ce (pronounced /keː/) and Q, named qu and pronounced /kuː/. In the earliest Latin inscriptions, the letters C, K and Q were all used to represent the sounds /k/ and /ɡ/ (which were not differentiated in writing). Of these, Q was used before a rounded vowel (e.g. ⟨EQO⟩ 'ego'), K before /a/ (e.g. ⟨KALENDIS⟩ 'calendis'), and C elsewhere. Later, the use of C and its variant G replaced most usages of K and Q. K survived only in a few fossilized forms such as Kalendae, "the calends".

After Greek words were taken into Latin, the Kappa was transliterated as a C. Loanwords from other alphabets with the sound /k/ were also transliterated with C. Hence, the Romance languages generally use C, in imitating Classical Latin's practice, and have K only in later loanwords from other language groups. The Celtic languages also tended to use C instead of K, and this influence carried over into Old English.

Use in writing systems

Pronunciation summary
Languages in italics are not usually written using the Latin alphabet
Language Dialect(s) Pronunciation (IPA) Environment Notes
Mandarin Chinese Standard // Pinyin romanization
English /k/ or silent See English orthography
Esperanto /k/
Faroese /k/
/tʃʰ/ Before ⟨e⟩ (except ⟨ei⟩), ⟨i⟩, and ⟨j⟩
German /k/
Greek Ancient /k/ See Romanization of Greek
Modern /k/ Except before /e, i/
/c/ Before /e, i/
Icelandic //, //, /k/, /c/, /ʰk/, /x/ See Icelandic orthography
Norwegian /k/ Except before ⟨i⟩ or ⟨y⟩
/ç/ Before ⟨i⟩ or ⟨y⟩
Swedish /k/
/ɕ/ Before ⟨e⟩, ⟨i⟩, ⟨y⟩, ⟨y⟩, ⟨ä⟩, ⟨ö⟩
Turkish /k/ Except before ⟨â⟩, ⟨e⟩, ⟨i⟩, ⟨ö⟩, ⟨û⟩, ⟨ü⟩ See Turkish alphabet
/c/ Before ⟨â⟩, ⟨e⟩, ⟨i⟩, ⟨ö⟩, ⟨û⟩, ⟨ü⟩

English

The letter usually represents /k/ in English. It is silent when it comes before ⟨n⟩ at the start of a stem, e.g.:

  • At the start of a word (knight, knife, knot, know, and knee)
  • After a prefix (unknowable)
  • In compounds (penknife)

English is now the only Germanic language to productively use "hard" ⟨c⟩ (outside the digraph ⟨ck⟩) rather than ⟨k⟩ (although Dutch uses it in loan words of Latin origin, and the pronunciation of these words follows the same hard/soft distinction as in English).[citation needed]

Like J, X, Q, and Z, the letter K is not used very frequently in English. It is the fifth least frequently used letter in the English language, with a frequency in words of about 0.8%.

Other languages

In most languages where it is employed, this letter represents the sound /k/ (with or without aspiration) or some similar sound.

The Latinization of Modern Greek also uses this letter for /k/. However, before the front vowels /e, i/ this is rendered as [c], which can be considered a separate phoneme.

Other systems

The International Phonetic Alphabet uses k for the voiceless velar plosive.

Other uses

  • In the International System of Units (SI), the SI prefix for one thousand is kilo-, officially abbreviated as k: for example, prefixed to metre/meter or its abbreviation m, kilometre or km signifies a thousand metres. As such, people occasionally represent numbers in a non-standard notation by replacing the last three zeros of the general numeral with K, as in 30K for 30,000.
  • "K" replacing "C" in satiric misspelling.
  • K is the unit symbol for the kelvin, used to measure thermodynamic temperature (note: degree sign is not used with this symbol).
  • K is the chemical symbol for element potassium (from its Latin name kalium).
  • Triangle K.
  • Josef K is the name of the principal character in Franz Kafka's novel The Trial.
  • In chess notation, the letter K represents the King (WK for White King, BK for Black King).
  • In baseball scoring, the letter K is used to represent a strikeout. A forwards oriented K represents a "strikeout swinging"; a backwards oriented K (K ) represents a "strikeout looking".
  • As abbreviation for OK, often used in emails and short text messages.
  • K is used as a slang term for Ketamine among recreational drug users.
  • In the CMYK color model, K represents black ink.
  • In International Morse code it is used to mean "over".
  • In fracture mechanics, K is used to represent the stress intensity factor.
  • In physics, k usually stands for the Boltzmann constant.
  • In argentinian politcs, K is used as a symbol for Kirchnerism
  • K (logic).
  • K is used colloquially to mean kilometre (as in "a 10K run").
  • K is used to indicate thousands, especially when expressing amounts of money, e.g. $20K = twenty thousand dollars.
  • In the United Kingdom under the old system (before 2001), a licence plate that begins with "K" for example "K123 XYZ" would correspond to a vehicle registered between August 1, 1992, and July 31, 1993. Again under the old system, a licence plate that ends with "K" for example "ABC 123K" would correspond to a vehicle that was registered between August 1, 1971, and July 31, 1972.
  • On Idaho license plates, an initial K in the plate number indicates it was issued in Kootenai County.

Ancestors, descendants and siblings

  • 𐤊 : Semitic letter Kaph, from which the following symbols originally derive
  • Κ κ/ϰ : Greek letter Kappa, from which K derives
  • К к : Cyrillic letter Ka, also derived from Kappa
  • K with diacritics: Ƙ ƙ, Ꝁ ꝁ, Ḱ ḱ, Ǩ ǩ, Ḳ ḳ, Ķ ķ, , Ⱪ ⱪ, Ḵ ḵ
  • The Uralic Phonetic Alphabet uses various forms of the letter K:
    • U+1D0B LATIN LETTER SMALL CAPITAL K
    • U+1D37 MODIFIER LETTER CAPITAL K
    • U+1D4F MODIFIER LETTER SMALL K
  • ₖ : Subscript small k was used in the Uralic Phonetic Alphabet prior to its formal standardization in 1902
  • Ʞ ʞ : Turned capital and small k were used in transcriptions of the Dakota language in publications of the American Board of Ethnology in the late 19th century. Turned small k was also used for a velar click in the International Phonetic Alphabet but its use was withdrawn in 1970.
  • 𝼐 : Small capital turned k is used as a click letter
  • 𝼃 : Small letter reversed k is used as a Voice Quality Symbol (VoQS)

Ligatures and abbreviations

Other representations

Computing

Character information
Preview K k
Unicode name LATIN CAPITAL LETTER K LATIN SMALL LETTER K KELVIN SIGN
Encodings decimal hex dec hex dec hex
Unicode 75 U+004B 107 U+006B 8490 U+212A
UTF-8 75 4B 107 6B 226 132 170 E2 84 AA
Numeric character reference K K k k
EBCDIC family 210 D2 146 92
ASCII 1 75 4B 107 6B
    1 Also for encodings based on ASCII, including the DOS, Windows, ISO-8859 and Macintosh families of encodings.

Other

References

  • K  Media related to K at Wiki Commons
  • K  The dictionary definition of K at Wiktionary
  • K  The dictionary definition of k at Wiktionary

Tags:

K HistoryK Use in writing systemsK Other usesK Related charactersK Other representationsK

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