Usar "acuminate" en una oración

1. A couched spear of acuminated granite rested by him while at his feet reposed a savage animal of the canine tribe whose stertorous gasps announced that he was sunk in uneasy slumber, a supposition confirmed by hoarse growls and spasmodic movements which his master repressed from time to time by tranquilising blows of a mighty cudgel rudely fashioned out of paleolithic stone

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