Inofficious /(?)/

In·of·fi·cious

Inofficious

a.
  1. Indifferent to obligation or duty. [Obs.]
    Thou drown'st thyself in inofficious sleep.
  2. Not officious; not civil or attentive. [Obs.]
  3. Regardless of natural obligation; contrary to natural duty; unkind; -- commonly said of a testament made without regard to natural obligation, or by which a child is unjustly deprived of inheritance. (Law)