retain

verb

1. 1

   keep in one's mind

   I cannot retain so much information

2. 2

   secure and keep for possible future use or application

   The landlord retained the security deposit

   I reserve the right to disagree

3. 3

   allow to remain in a place or position or maintain a property or feature

   We cannot continue several servants any longer

   She retains a lawyer

4. 4

   hold back within

   This soil retains water

   I retain this drug for a long time