LekhoriLekhoriconsistently accurate; not missing a target.
1717: Hissing in air the unerring weapon flew. -- John Dryden's 1697–1700 translation of "The Story of Meleager and Atalanta", in Ovid's Metamorphoses (tr. Garth, Dryden, et al.), book VIII, pub. 1717
From un- + erring.
Select a language to see translations