Unplanned

Adjective

 * 1) unintentional; not intended
 * 2) spontaneous and not thought through in advance
 * 3) not having any structure or organization

Thesaurus
ad-lib, aimless, caught napping, caught off balance, caught short, designless, desultory, extemporaneous, extemporized, haphazard, hasty, hit-or-miss, impromptu, improvised, inadvertent, indiscriminate, involuntary, makeshift, precipitate, purposeless, rough-and-ready, snap, surprised, taken aback, taken by surprise, taken unawares, tripped up, unarranged, unbegun, unconcocted, unconscious, unconsidered, uncontrived, undeliberated, undesigned, undevised, unguarded, unguided, unhatched, unintended, unintentional, unmade, unmanufactured, unmeant, unmeditated, unorganized, unpremeditated, unprepared, unprimed, unprompted, unpurposed, unready, unstudied, unthinking, unthought, unthought-of, unwitting

Translations

 * Czech: