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. Usage notes . Many nouns formed with -ity are uncountable; those that are countable form their plurals in -ities.
Duncan Hazlett McGuire was an Australian musician, songwriter, recording engineer and producer. He was associated with vocalist, Doug Parkinson, in various groups during the 1960s and 1970s; McGuire was also a founding member of the jazz fusion band, Ayers Rock from 1973 until he left in 1976.
For other people named Arthur Duncan, see Arthur Duncan (disambiguation). Arthur Duncan (born September 25, 1933 in Pasadena, California) is a tap dancer, known for his stint as a performer on The Lawrence Welk Show from 1964 to 1982, which made him the first African-American regular on a variety television program.