incomprehensive

Webster's Dictionary (1913)

Not comprehensive; not capable of including or of understanding; not extensive; limited. — In·com′wb-a2′>′pre·hen′wb-a1′>′sive·ly, adjective Sir William Hamilton — In·com′wb-a2′>′pre·hen′wb-a1′>′sive·ness, noun Thomas Warton

Webster’s Revised Unabridged Dictionary (1913), from GCIDE 0.54