mighteous

From might +‎ -eous, modelled after righteous, equivalent to might +‎ -wise.

mighteous (comparative more mighteous, superlative most mighteous)

1. Possessing might; mighty; powerful; mightily righteous.
   • 1909, Charles Baudelaire, Cyril Scott (translator), The Flowers of Evil

     The sea is thy mirror, thou regardest thy soul In its mighteous waves that unendingly roll, And thy spirit is yet not a chasm less drear.

   • 1916, Baynard Rush Hall, James Albert Woodburn, The new purchase

     Still, it was quite edifying to witness the anxious bustling, and to hear the learned remarks of our dwarf Esculapius; who among other things, was constrained to acknowledge that — "unassisted nature had yet mighteous potential efficacity of her own intrinsic internal force, [...]

   • 1969, Black World/Negro Digest, Oct 1969

     We used to sleep the sleep of the mighteous, never reaching for d'epistle tucked, unfriared, under the brillo's ear.

   • 1998, G. N. Das, Shri Rama: the man and his mission

     In the gods and humans, demons and birds I have my followers everywhere obedient to me; Khara and Dushana, the demons, are as mighteous as I myself.

• semitough