Truthily

Truthily is the adverbial form of truthiness and other truthial words. It was first used by William Colbert Shakespeare in A Winter's Tale, Act I, Scene II: "Truthily, you shall not go: a lady's 'truthily' 's as potent as a lord's." Shakespeare scholars believe that the "lady" is Iron Lady Margaret Thatcher; while "lord" is an obvious reference to Jack Lord from Hawaii Five-O.