Cot–caught merger

Sound change in some English dialects

The cot–caught merger, also known as the LOT–THOUGHT merger or low back merger, is a sound change present in some dialects of English where speakers do not distinguish the vowel phonemes in words like cot versus caught. Cot and caught is an example of a minimal pair that is lost as a result of this sound change. The phonemes involved in the cot–caught merger, the low back vowels, are typically represented in the International Phonetic Alphabet as and or, in North America, as and. The merger is typical of most Indian, Canadian, and Scottish English dialects as well as some Irish and U.S. English dialects.

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