nonretentive

• a word derived from retentive.
  retentive

  adjective

  tending or serving to retain something.

Related Words

• cohesive
• determined
• dogged
• forceful
• persistent
• relentless
• resolute
• spunky
• staunch
• steadfast
• stout
• strong-willed
• stubborn
• tough
• unswerving