inelastic
adjective
uk/ˌɪnɪˈlæstɪk/ us ECONOMICS
relating to a situation in which the amount of a product sold or supplied changes very little in relation to the product's price:
Cereal prices are considered "inelastic," meaning that a 10-percent price increase tends to boost supplies by only one or two percentage points.
Supply of oil is notoriously inelastic: it can only respond slowly to price changes.
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elastic