Bohemian, ad-lib, affable, artless, automatic, casual, caught napping, caught off balance, caught short, colloquial, common, conversational, cordial, degage, easy, easygoing, everyday, extemporaneous, extemporary, extempore, extemporized, familiar, folksy, free and easy, gracious, gut, haphazard, hasty, haymish, homely, homey, ill-advised, ill-considered, ill-devised, impromptu, improvised, inadvertent, indeliberate, informal, ingenuous, involuntary, irregular, loose, makeshift, naive, natural, nonstandard, offhand, offhanded, plain, precipitate, reflex, reflexive, relaxed, rough-and-ready, simple, snap, sociable, spoken, spontaneous, spur-of-the-moment, substandard, surprised, taken aback, taken by surprise, taken unawares, tripped up, unadvised, unaffected, unarranged, unartificial, unassuming, unbegun, uncalculated, unceremonious, unconcocted, unconscious, unconsidered, unconstrained, uncontrived, unconventional, undeliberate, undeliberated, undesigned, undevised, uneducated, unexamined, unexplored, unhatched, unintended, unintentional, unliterary, unmade, unmanufactured, unmeditated, unofficial, unorganized, unplanned, unpremeditated, unprepared, unprimed, unready, unrehearsed, unscanned, unschooled, unsearched, unsifted, unsophisticated, untutored, unweighed, unwilled, vernacular