erosion
B1CEFR level
30/100Rarity: fairly common
TechnicalRegister
Medicine noun
The chemical dissolution of tooth surface by acids not of bacterial origin.
Frequent consumption of citrus drinks caused palatal erosion of the upper incisors.
Business noun
The gradual reduction of a company's market share, margins, or competitive position.
Persistent price erosion in the core market pushed management to seek growth through acquisition instead.
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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