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.
Duncan Hazlett McGuire's music career began in 1959 with his first band, The Phantoms, in Sydney. By 1963, on bass guitar, he had joined Roland Storm and The Statesmen, which included Storm on lead vocals, Mike Allen on drums, Peter Maxworthy on lead guitar, and Mark Rigney on drums.