linguistic:paraphrasing, information:extraction
In linguistics, lenition is a sound change that alters consonants, making them “weaker” in some way. The word lenition itself means "softening" or "weakening". Lenition can happen both synchronically and diachronically. Lenition can involve such changes as voicing a voiceless consonant, causing a consonant to relax occlusion, to lose its place of articulation, or even causing a consonant to disappear entirely. An example of synchronic lenition is found in most varieties of American English, in the form of tapping: the of a word like wait is pronounced as the more sonorous in the related form waiting. Some varieties of Spanish show debuccalization of to at the end of a syllable, so that a word like estamos "we are" is pronounced. An example of diachronic lenition can be found in the Romance languages, where the of Latin patrem has become in Italian and Spanish padre, while in Catalan pare, French père and Portuguese pai historical has disappeared completely. In some languages, lenition has been grammaticalized into a consonant mutation, which means it is no longer triggered by its phonological environment but is now governed by its syntactic or morphological environment. For example, in Welsh, the word cath "cat" begins with the sound, but after the definite article y, the changes to : "the cat" in Welsh is y gath. This was historically due to intervocalic lenition, but in the plural, lenition does not happen, so "the cats" is y cathod, not *y gathod. The change of to in y gath is thus caused by the syntax of the phrase, not by the modern phonological position of the consonant. The opposite of lenition, fortition, a sound change that makes a consonant "stronger", is less common, but Breton and Cornish have "hard mutation" forms which represent fortition.