uncontrived

uncontrived
    adj 1: not by design or artifice; unforced and impromptu; "an
           air of unstudied spontaneous utterance is apt to be
           painstakingly achieved"; "simple unstudied charm" [syn:
           {unstudied}, {uncontrived}] [ant: {studied}]
    

34 Moby Thesaurus words for "uncontrived":
      ad-lib, caught napping, caught off balance, caught short,
      extemporaneous, extemporized, haphazard, hasty, impromptu,
      improvised, makeshift, precipitate, rough-and-ready, snap,
      surprised, taken aback, taken by surprise, taken unawares,
      tripped up, unarranged, unbegun, unconcocted, undeliberated,
      undevised, unhatched, unmade, unmanufactured, unorganized,
      unplanned, unpremeditated, unprepared, unprimed, unready,
      unstudied