indefatigable
/ˌɪn.dəˈfæt.ɪ.ɡə.bəl/ adjective C2- Extremely persistent and untiring.
From the library
Faria has dreamed this; the Cardinal Spada buried no treasure here; perhaps he never came here, or if he did, Cæsar Borgia, the intrepid adventurer, the stealthy and indefatigable plunderer, has followed him, discovered his traces, pursued them as I have done, raised the stone, and descending before me, has left me nothing.”
She was a perfect linguist, a first-rate artist, wrote poetry, and composed music; to the study of the latter she professed to be entirely devoted, following it with an indefatigable perseverance, assisted by a schoolfellow,—a young woman without fortune whose talent promised to develop into remarkable powers as a singer.
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