unrehearsed
un re hearsed |ˌənriˈhərst ˌənrəˈhərst | ▶adjective not practiced before a performance: spontaneous and unrehearsed music.
un |re ¦hearsed |ʌnrɪˈhəːst | ▶adjective not practised before a performance: spontaneous and unrehearsed music.