ˈkaʒuəl ˈkæʒuəl ˈkɛʒʉɘl ɪnˈsuːsɪənt inˈsusiənt ˈnɒn.ʃəl.ənt ˌnɑn.ʃəˈlɑnt marked by blithe unconcern an ability to interest casual students showed a casual disregard for cold weather an utterly insouciant financial policy an elegantly insouciant manner drove his car with nonchalant abandon was polite in a teasing nonchalant manner