The Collaborative International Dictionary of English v.0.48:

Unreflecting \Unreflecting\
   See reflecting.

Moby Thesaurus II by Grady Ward, 1.0:

45 Moby Thesaurus words for "unreflecting":
   arbitrary, capricious, careless, heedless, ill-advised,
   ill-considered, ill-contrived, ill-devised, ill-gauged, ill-judged,
   impolitic, imprudent, inadvertent, inadvisable, inconsiderate,
   indiscreet, inexpedient, injudicious, insensate, irrational,
   mindless, misadvised, misguided, myopic, reasonless, reckless,
   senseless, shortsighted, thoughtless, unadvised, uncalculating,
   unconsidered, undiscerning, unforeseeing, unguarded, unreasonable,
   unreasoning, unreflective, unseeing, unsensible, unsound,
   unthinking, unthoughtful, unwise, witless