Englishfor English speakers
unique
Adjective
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If something is unique, it is one of a kind; it is unmatched.
When the school for the deaf opened, it was unique in Europe.
Of course, the problem is not unique to this country.
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If something is unique, it is rare or unusual.
Oh, thank you! What a unique gift!
Living in Japan was a unique experience.
decipherability
noun
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(uncountable) The condition of being decipherable.
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(countable) The extent to which something can be deciphered.