UNPARDONABLE
Un*par"don*a*ble, a.

Defn: Not admitting of pardon or forgiveness; inexcusable.

UNPARENTED
Un*par"ent*ed, a.

Defn: Having no parent, or no acknowledged parent. [R.]

UNPARLIAMENTARY
Un*par`lia*men"ta*ry, a.

Defn: Not parliamentary; contrary to the practice of parliamentary
bodies.
— Un*par`lia*men"ta*ri*ness, n.

UNPARTIAL
Un*par"tial, a.

Defn: Impartial. [Obs.] Bp. Sanderson.
— Un*par"tial*ly, adv. [Obs.] Hooker.

UNPASSABLE
Un*pass"a*ble, a.

Defn: Impassable. E. A. Freeman.
— Un*pass"a*ble*ness, n. Evelyn.