unconscionable

adjectives

lacking a conscience
"a conscienceless villain"; "brash, unprincipled, and conscienceless"; "an unconscionable liar"
conscienceless, unconscionable
greatly exceeding bounds of reason or moderation
"exorbitant rent"; "extortionate prices"; "spends an outrageous amount on entertainment"; "usurious interest rate"; "unconscionable spending"
exorbitant, extortionate, outrageous, steep, unconscionable, usurious