fissure
B2CEFR level
65/100Rarity: rare
TechnicalRegister
A linear cleft or crack through the epidermis and into the dermis, often painful and prone to occur in thickened skin.
Painful fissures had developed on the heels as a result of the chronic hyperkeratosis.
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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