I. |ən|känch(ə)nəbəl adjective
1. : not guided or controlled by conscience : unscrupulous
an unconscionable villain
2.
a. : excessive , exorbitant
advertising and promotion costs an unconscionable amount — G.P.Brockway
was staying up there an unconscionable time — Joseph Conrad
b. : lying outside the limits of what is reasonable or acceptable : shockingly unfair, harsh, or injust : outrageous
the grinding poverty, the unconscionable death rate, and the appalling illiteracy — Commonweal
II. adverb
: unconscionably