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phonology Phonology (formerly also phonemics or phonematics: "phonemics ''n.'' 'obsolescent''1. Any procedure for identifying the phonemes of a language from a corpus of data. 2. (formerly also phonematics) A former synonym for phonology, often pre ...
and
phonetics Phonetics is a branch of linguistics that studies how humans produce and perceive sounds or, in the case of sign languages, the equivalent aspects of sign. Linguists who specialize in studying the physical properties of speech are phoneticians ...
, raising is a sound change in which a
vowel A vowel is a speech sound pronounced without any stricture in the vocal tract, forming the nucleus of a syllable. Vowels are one of the two principal classes of speech sounds, the other being the consonant. Vowels vary in quality, in loudness a ...
or
consonant In articulatory phonetics, a consonant is a speech sound that is articulated with complete or partial closure of the vocal tract, except for the h sound, which is pronounced without any stricture in the vocal tract. Examples are and pronou ...
becomes higher or raised, meaning that the tongue becomes more elevated or positioned closer to the roof of the mouth than before. The opposite effect is known as lowering. Raising or lowering may be triggered by a nearby sound, when it is a form of assimilation, or it may occur on its own. In i-mutation, a front vowel is raised before or , which is assimilation. In the Attic dialect of
Ancient Greek Ancient Greek (, ; ) includes the forms of the Greek language used in ancient Greece and the classical antiquity, ancient world from around 1500 BC to 300 BC. It is often roughly divided into the following periods: Mycenaean Greek (), Greek ...
and in
Koine Greek Koine Greek (, ), also variously known as Hellenistic Greek, common Attic, the Alexandrian dialect, Biblical Greek, Septuagint Greek or New Testament Greek, was the koiné language, common supra-regional form of Greek language, Greek spoken and ...
, close-mid were raised to . The change occurred in all cases and was not triggered by a nearby front consonant or vowel. Later, Ancient Greek was raised to become Koine Greek and then . For more information, see In Czech, the alveolar trill was raised before to become the raised alveolar trill , spelled as in . That is a form of palatalization, and it also occurred in Polish in which it became a simple sibilant fricative (spelled or ) around the 16th century. The pronunciation in Polish is considered to be nonstandard and is used only by some older speakers. Vowel shifts {{Phonetics-stub