Suffix -ity Used to form a noun from an adjective; especially, to form the noun referring to the state, property, or quality of conforming to the adjective's description. Used to form other nouns, especially abstract nouns. Many nouns formed with -ity are uncountable; those that are countable form their plurals in -ities.
King Duncan is a fictional character in Shakespeare's Macbeth. He is the father of two youthful sons (Malcolm and Donalbain), and the victim of a well-plotted regicide in a power grab by his trusted captain Macbeth.
Duncan is Macbeth's murder victim in the Shakespeare play Macbeth. Duncan is the incumbent Thane of Cawdor. Lady Macbeth and Macbeth plot to kill Duncan and take over his reign, and Macbeth stabs Duncan.