Writing & Editing Is it ‘historic’ or ‘historical’? A look at adjectives and prepositions that cause confusion Do you wait for someone to show up, but wait on a customer? Get up to speed on the definitive answer—if there is one—in this attempt to tackle common puzzlements. By Denise C. BaronMarch 11, 2011 SHARE To read the full story, log in. Become a Ragan Insider member to read this article and all other archived content. Sign up today Already a member? Log in here. Learn more about Ragan Insider.