maternal

repetition evokes a 'holding environment', or regression to an imagined state of prelinguistic origins
(Raymond Scott's Soothing Sounds for Baby)

mantric

repetition portrays a state of mystical transcendence
(Arvo Pärt's "liturgical minimalism"; John Adams's Shaker Loops)

kinetic

repetition depicts (or incites) a collectivity of dancing bodies
(Spring Heel Jack; various electronica)

totalitarian

repetition evokes an involuntary state of unfreedom
(Rzewski's Coming Together, Andriessen's De Staat)

motoric

repetition evokes an indifferent mechanized process
(Nyman's Musique à Grande Vitesse, Adams's Short Ride in a Fast Machine)

aphasic

repetition conveys notions of cognitive impairment, madness, or logical absurdity
(Nyman's The Man Who Mistook His Wife for a Hat, Satie's Vexations)