abandoned, ad lib, at short notice, at sight, beyond control, breachy, by ear, contumacious, defiant, extemporaneously, extemporarily, extempore, fractious, go-go, immoderate, impromptu, incontinent, incorrigible, indocile, indomitable, indulgent, insuppressible, intemperate, intractable, irrepressible, lax, licentious, loose, nonrestrictive, obstreperous, off the cuff, off the hip, offhand, on sight, out of control, permissive, rampant, recalcitrant, refractory, reinless, resistant, resisting, restive, riotous, shrewish, unbiddable, unbridled, unchecked, uncoerced, uncompelled, unconstrained, uncontrollable, uncontrolled, uncurbed, unforced, ungovernable, ungoverned, uninhibited, unmalleable, unmanageable, unmastered, unmeasured, unmoldable, unmuzzled, unreined, unrepressed, unreserved, unrestrained, unrestrictive, unruly, unsubdued, unsubmissive, unsuppressed, wanton, wild