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sigmatism

[ sig-muh-tiz-uhm ]
/ ˈsɪg məˌtɪz əm /
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noun
defective pronunciation of sibilant sounds.
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On the farm, the feed for chicks is significantly different from the roosters’; ______ not even comparable.

Origin of sigmatism

1885–90; <Greek sigmat-, stem of sígmasigma + -ism
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

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