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) where the following word starts with a vowel — and elision would not happen if the second word began with a glottal stop (or any form of stop consonant). In his Vox Graeca, W. Sidney Allen accordingly regards the glottal stop interpretation as "highly improbable".
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 ὕ hy, rather than ὔ 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.
Famous quotes containing the words smooth and/or breathing:
“It may seem strange that any road through such a wilderness should be passable, even in winter, when the snow is three or four feet deep, but at that season, wherever lumbering operations are actively carried on, teams are continually passing on the single track, and it becomes as smooth almost as a railway.”
—Henry David Thoreau (1817–1862)
“And each of the huge white creatures was huger than fourscore men;
The tops of their ears were feathered, their hands were the claws of birds,
And, shaking the plumes of the grasses and the leaves of the mural glen,
The breathing came from those bodies, long warless, grown whiter than curds.”
—William Butler Yeats (1865–1939)