Inofficious

Part of speech: adjective (a.)

1. Indifferent to obligation or duty. [Obs.] Thou drown'st thyself in inofficious sleep. B. Jonson.

2. Not officious; not civil or attentive. [Obs.] Jonhson.

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. "The inofficious testament." Blackstone. "An inofficious disposition of his fortune." Paley.