Abracadabra :: Abracadabra (n.) A mystical word or collocation of letters written as in the figure. Worn on an amulet it was supposed to ward off fever. At present the word is used chiefly in jest to denote something without meaning; jargon.
Abradant :: Abradant (n.) A material used for grinding, as emery, sand, powdered glass, etc..
Abrade :: Abrade (v. t.) To rub or wear off; to waste or wear away by friction; as, to abrade rocks..