Smooth breathing

"᾿" redirects here. For the similar character "ʼ", see Ejective consonant.
Smooth breathing
Diacritics in Latin & Greek
acute( ´ )
double acute( ˝ )
grave( ` )
double grave(  ̏ )
breve( ˘ )
inverted breve(  ̑ )
caron, háček( ˇ )
cedilla( ¸ )
circumflex( ˆ )
diaeresis, umlaut( ¨ )
dot( · )
hook, hook above(   ̡   ̢  ̉ )
horn(  ̛ )
iota subscript(  ͅ  )
macron( ¯ )
ogonek, nosinė( ˛ )
perispomene(  ͂  )
ring( ˚, ˳ )
rough breathing( )
smooth breathing( ᾿ )
Marks sometimes used as diacritics
apostrophe( )
bar( ◌̸ )
colon( : )
comma( , )
hyphen( ˗ )
tilde( ~ )
Diacritical marks in other scripts
Arabic diacritics
Early Cyrillic diacritics
kamora(  ҄ )
pokrytie(  ҇ )
titlo(  ҃ )
Gurmukhī diacritics
Hebrew diacritics
Indic diacritics
anusvara( )
chandrabindu( )
nukta( )
virama( )
chandrakkala( )
IPA diacritics
Japanese diacritics
dakuten( )
handakuten( )
Khmer diacritics
Syriac diacritics
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Dotted circle
Punctuation marks
Logic symbols

The smooth breathing (Ancient Greek: ψιλὸν πνεῦμα psilòn pneûma; Modern Greek: ψιλή psilí; Latin: spīritus lēnis) is a diacritical mark used in polytonic orthography. In ancient Greek, it marks the absence of the voiceless glottal fricative /h/ from the beginning of a word.

Some authorities have interpreted it as representing a glottal stop, but a final vowel at the end of a word is regularly elided (removed) when the following word starts with a vowel and elision would not happen if the second word began with a glottal stop (or any other form of stop consonant). In his Vox Graeca, W. Sidney Allen accordingly regards the glottal stop interpretation as "highly improbable".[1]

The smooth breathing ( ᾿ ) is written as on top of one initial vowel, on top of the second vowel of a diphthong or to the left of a capital and also, in certain editions, on the first of a pair of rhos. It did not occur on an initial upsilon, which always has rough breathing (thus the early name hy, rather than y).

The smooth breathing was kept in the traditional polytonic orthography even after the /h/ sound had disappeared from the language in Hellenistic times. It has been dropped in the modern monotonic orthography.


The origin of the sign is thought to be the right-hand half ( ) of the letter H, which was used in some Greek dialects as [h] while in others it was used for the vowel eta. In medieval and modern script, it takes the form of a closing half moon (reverse C) or a closing single quotation mark:

Smooth breathings were also used in the early Cyrillic and Glagolitic alphabets when writing the Old Church Slavonic language. Today it is used in Church Slavonic according to a simple rule: if a word starts with a vowel, the vowel has a psili over it. From the Russian writing system, it was eliminated by Peter the Great during his alphabet and font-style reform (1707). All other Cyrillic-based modern writing systems are based on the Petrine script, so they have never had the smooth breathing.


The coronis (κορωνίς, korōnís, "crow's beak" or "bent mark"), the symbol written over a vowel contracted by crasis,[2] was originally an apostrophe after the letter: τα᾽μά. In present use, its appearances in Ancient Greek are written over the medial vowel with the smooth breathing markτἀμάand appearances of crasis in modern Greek are not marked.


In Unicode, the code points assigned to the smooth breathing are U+0313 ̓ COMBINING COMMA ABOVE for Greek and U+0486 ҆ COMBINING CYRILLIC PSILI PNEUMATA for Cyrillic. The pair of space + spiritus lenis is U+1FBF ᾿ GREEK PSILI. The coronis is assigned two distinct code points, U+1FBD GREEK KORONIS and U+0343 ̓ COMBINING GREEK KORONIS.

See also


  1. W. Sidney Allen (1968–74). Vox Graeca: A Guide to the Pronunciation of Classical Greek. Cambridge University Press. ISBN 0-521-20626-X.
  2. Note on terminology:
    Crasis in English usually refers to merging of words, but the sense of the word in the original Greek used to be more general,[3] referring to most changes related to vowel contraction, including synaeresis, though this is no longer the case.
  3. "crasis". Oxford English Dictionary (3rd ed.). Oxford University Press. September 2005. (Subscription or UK public library membership required.)
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