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Alternation (linguistics)

language culture Maturity 11-13 Next article →

Words can change their sounds in many ways. In linguistics, this is called alternation. An alternation happens when one part of a word sounds different. Each different sound is called an alternant.

Sometimes, the sounds around a word cause the change. We call this phonological conditioning. In English, the plural marker for many words is 's' or 'es'. The sound of this marker changes based on the last sound of the word. If a word ends in a sibilant, like 'mass,' we say 'masses.'

If the last sound is voiceless, like 'mop,' we say 'mops.' If the last sound is voiced, like 'dog,' we say 'dogs.' This change helps words flow.

Other rules cause changes too. In French, some adjectives change for feminine words. This is called morphological conditioning. In Irish and Welsh, words change based on their place in a sentence. This is called syntactic conditioning. These shifts do not change the whole language. They only change how a single word sounds in a moment.

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