1. 违背良心的
If you describe something as unconscionable, you mean that the person responsible for it ought to be ashamed of it, especially because its effects are so great or severe.

1. greatly exceeding bounds of reason or moderation

e.g. exorbitant rent
extortionate prices
spends an outrageous amount on entertainment
usurious interest rate
unconscionable spending

Synonym: exorbitantextortionateoutrageoussteepusurious

2. lacking a conscience

e.g. a conscienceless villain
brash, unprincipled, and conscienceless
an unconscionable liar

Synonym: conscienceless