unperceptive
1. [ adjective ] lacking perception
Synonyms: unperceiving
Examples:

"as unperceptive as a boulder"

Related terms: perceptive blind unobservant
2. [ adjective ] lacking sensitivity, taste, or judgment
Related terms: undiscriminating
Similar spelling:   unperceived
  unappreciative
  unperceivable
  unperceiving
  unpersuasive
  unpermissive
  unapprehensive
  unpierced
  unperturbed
  unperformed