Conscienceless

a.

1.

Without conscience; indifferent to conscience; unscrupulous. Conscienceless and wicked patrons. - Hookre.

Adj.

1.

conscienceless - lacking a conscience; "a conscienceless villain"; "brash, unprincipled, and conscienceless"; "an unconscionable liar" Synonyms: unconscionable

unconscientious, unconscionable