The English writing system has 461 graphemes which represent 40 phonemes.
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A monogram is a motif made by overlapping or combining two or more letters or other graphemes to form one symbol.
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Graphemes are individual units of written language (letters or symbols), while synesthesia is a neurological condition where stimulation of one sensory pathway leads to automatic, involuntary experiences in another pathway. In grapheme-color synesthesia, certain graphemes trigger a specific color sensation for individuals with this condition.
There are five graphemes in the word eight, e, i, g, h and t. However, there are only two or possibly three phonemes depending which parts of the word are regarded as digraphs or trigraphs.
/l/u/n/ch
The word "finger" contains 5 phonemes: /f/ /ɪ/ /ŋ/ /g/ /ə/.