[1830–40; definite + -tude]This word is first recorded in the period 1830–40. Other words that entered Englishat around the same time include: baby talk, format, isometric, nationalism, showcase-tude is a suffix appearing in abstract nouns (generally formed from Latin adjectives orparticiples) of Latin origin (latitude; altitude). On this model, -tude is, used in the formation of new nouns (platitude)