I studied the transition in ‘Uttō’ based on the reference of the Middle Ages. As a result, the meaning and usage of a modern language ‘Uttō’ ’has been expanded along with the extinction of the adjective ‘Ibseshi’. ‘Uttō’ was used to describe 'Depiction of the psychological state' and 'Depiction of the specific conditions'. The nounal usage was the mainstream before the the medieval spoken material, I could confirmed the adjectival usage of ‘Uttōshii’ through the medieval spoken material. The meaning of ‘Uttōshii’ had shared the area of the meaning with ‘Uttpun’ ‘Ikidoori’ ‘meiwakuda’ and ‘Kinodokuda’ The usage of ‘meiwakuda’ ‘Kinodokuda’ had been used frequently in the the modern literature.