Oxford Spanish Dictionary
unconscionable
1. (excessive) desmesurado, desorbitado
2. (unprincipled) liar – desaprensivo, sin escrúpulos

Black’s Law Dictionary
unconscionability
1.Extreme unfairness .• Unconscionability is normally assessed by an objective standard: (1) one party’s lack of meaningful choice, and (2) contractual terms that unreasonably favor the other party.
2. The principle that a court may refuse to enforce a contract that is unfair or oppressive because of procedural abuses during contract formation or because of overreaching contractual terms, esp. terms that are unreasonably favorable to one party while precluding meaningful choice for the other party. • Because unconscionability depends on circumstances at the time the contract is formed, a later rise in market price is irrelevant.
“Traditionally, a bargain was said to be unconscionable in
an action at law if it was 'such as no man in his senses and
not under delusion would make on the one hand, and as no
honest and fair man would accept on the other;' damages
were then limited to those to which the aggrieved party
was 'equitably' entitled. Even though a contract was fully
enforceable in an action for damages, equitable remedies
such as specific performance were refused where 'the sum
total of its provisions drives too hard a bargain for a court
of conscience to assist.' Modern procedural reforms have
blurred the distinction between remedies at law and in
equity. For contracts for the sale of goods, Uniform Commercial
Code § 2·302 states the rule of this Section without
distinction between law and equity. Comment 1 to that
section adds, 'The principle is one of the prevention of
oppression and unfair surprise ... and not of disturbance
of allocation of risks because of superior bargaining
power.'" Restatement (Second) of Contracts § 208 cmt. b
(1979) (citations omitted).
"Nowhere among the [Uniform Commerciall Code's many
definitions is there one of unconscionability. That the
term is incapable of precise definition is a source of both
strength and weakness." E. Allan Farnsworth, Contracts
§ 4.28, at 310 (3d ed. 1999)
procedural unconscionability. Unconscionability resulting from improprieties in contract formation (such as oral misrepresentations or disparities in bargaining position) rather than from the terms of the contract itself.
"Most cases of unconscionability involve a combination
of procedural and substantive unconscionability, as it is
generally agreed that if more of one is present, then less
of the other is required." E. Allan Farnsworth, Contracts
§ 4.28, at 312 (3d ed. 1999).
substantive unconscionability. Unconscionability resulting from actual contract terms that are unduly harsh, commercially unreasonable, and grossly unfair given the existing circumstances.