Incogitant

In·cog'i·tant adjective [ Latin incogitans ; prefix in- not + cogitans , present participle of cogitare to think. See Cogitate .] Thoughtless; inconsiderate. [ R.] Milton. « Men are careless and incogitant J. Goodman.
Found on http://www.encyclo.co.uk/webster/I/33

Incogitant

• (a.) Toughtless; inconsiderate.
Found on http://thinkexist.com/dictionary/meaning/incogitant/

incogitant

incogitant 1. Thoughtless; unthinking; characterized by want of thought; inconsiderate. 2. Not having the faculty of thinking.
Found on http://www.wordinfo.info/words/index/info/view_unit/2749/6
No exact match found