extortionate

Adjective
  1. Greatly exceeding bounds of reason or moderation (synset 301538377)
    "exorbitant rent"; "extortionate prices"; "spends an outrageous amount on entertainment"; "usurious interest rate"; "unconscionable spending"
    similar to: immoderate - beyond reasonable limits
    same as: exorbitant, outrageous, steep, unconscionable, usurious

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