unreflecting

adjective2

1. •
   Not giving reflection or thought to one's actions, words, conclusions, etc.; (of an action, statement, conclusion, etc.) done without reflection or thought. (of a person)

   • Now what Discourse can be more suited to the Principles of these young Cubs of the Leviathan, than not to punish credulous and unreflecting People for being cheated and abused? — 1671
2. •
   That does not reflect light or sound.

   • […] a mirror may have picturesque beauty; but it is only from it's reflections. In an unreflecting state, it is insipid. — 1792