A linguistic system or theory based on the use of two-letter roots or biliteral elements as the fundamental building blocks of words.
From 'biliteral' + '-ism' (a system or practice). This scholarly term emerged in comparative linguistics during the 19th century when researchers studied the structure of ancient languages.
If you think English spelling is weird, imagine a language where almost every word comes from combining just two basic letters—that's the elegant efficiency some ancient languages achieved!
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