Artificial intelligent assistant

powerfulness

ˈpowerfulness
  [f. as prec. + -ness.]
  The quality of being powerful; mightiness; strength, potency; impressiveness, convincing quality.

c 1586 C'tess Pembroke Ps. lxxxix. iii, Who can maintaine With Thee in powrfullnes a rivall's quarrell? 1605 Drayton Leg. Dk. Normandy xxxiv, As though her words such power⁓fulnesse did beare. 1735–6 Carte Ormonde I. 113 That by the powerfulness of some ministers of State..the Parliament had not its natural freedom. 1824 New Monthly Mag. XII. 249 A certain degree of want of powerfulness [of voice] in various parts of her scale. 1961 Chicago Rev. Summer 94 Their art is an imitation of the inescapable powerfulness of this unknown and empty world. 1975 Listener 24 July 109/3 The powerfulness of Queenie Leavis's mind.

Oxford English Dictionary

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