Artificial intelligent assistant

defatigable

deˈfatigable, a.
  [ad. L. type dēfatīgābil-is (found in negative indēfatīgābilis), f. fatīgāre to fatigue: see -ble.]
  1. Apt to be wearied; capable of being wearied.

1656 Blount Glossogr., Defatigable, easily to be wearyed. 1659 D. Pell Impr. Sea 244 That when this bird is defatigable, and wearied with flying, that hee will betake himself to any ship. 1662 Glanvill Lux Orient. (1682) 116 We were made on set purpose defatigable, that so all degrees of life might have their exercise. 1948 E. Waugh Loved One (1949) 2 Then they lost interest. I did too. I was always the most defatigable of hacks. 1958 Times Lit. Suppl. 25 July 418/3 Mr Toynbee, by his own admission the most defatigable of marchers, has reverted to the written word.

   2. Apt to weary or fatigue. Obs.

1657 Tomlinson Renou's Disp. Pref., My Imployments..and defatigable diuturnal Labours.

  Hence deˈfatigableness.

1727 Bailey vol. II, Defatigableness, aptness to be tired.

Oxford English Dictionary

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