acquired distinctiveness
C2CEFR level
90/100Rarity: very rare
TechnicalRegister
The capacity of an otherwise descriptive mark to identify source, gained through long and exclusive use in the market.
'Sharp' is descriptive, but decades of trading gave it acquired distinctiveness.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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