01. GADFLY Meaning - a persistently annoying person. Synonyms - Pest, blighter, cuss. Antonyms - // Comment if you Know. Usage - The gadfly petrels pose a challenge to modern taxonomists. 02. GAFFE Meaning - A clumsy social error; a faux pas. Synonyms - blunder, mistake, error, gauche. Antonyms - correction. Usage - She made an embarrassing gaffe by bring giraffe. 03. GAINSAY Meaning - To declare false. Synonyms - deny, disagree, contradict, ...more»