ad-lib aimless amorphous capricious casual caught napping caught off balance caught short desultory disarticulated discontinuous disjunct disordered dispersed disproportionate erratic extemporaneous extemporized fitful formless frivolous gratuitous haphazard hasty hit-or-miss immethodical impromptu improvised inchoate incoherent indiscriminate irregular makeshift meaningless misshapen nonsymmetrical nonsystematic nonuniform orderless planless precipitate promiscuous random rough-and-ready senseless shapeless snap spasmodic sporadic straggling straggly surprised systemless taken aback taken by surprise taken unawares tripped up unbegun unclassified unconcocted uncontrived undeliberated undevised undirected ungraded unhatched unjoined unmade unmanufactured unmethodical unordered unorganized unplanned unpremeditated unprepared unprimed unready unsorted unstudied unsymmetrical unsystematic ununiform vague wandering