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Raising (phonetics)
In phonology and phonetics, raising is a sound change in which a vowel or consonant 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, in which case they are a form of assimilation, or they may occur on their own.
In i-mutation, a front vowel is raised before or . This is assimilation.
In the Attic dialect of Ancient Greek and in Koine Greek, close-mid were raised to . This 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 . This is a form of palatalization. In Polish, was also palatalized, but instead became the voiced retroflex sibilant , spelled .
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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