retain
verb.
hold back within
This soil retains water|I retain this drug for a long time|the dam retains the water
verb.
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|The family's fortune waned and they could not keep their household staff|Our grant has run out and we cannot keep you on|We kept the work going as long as we could|She retained her composure|this garment retains its shape even after many washings
Synonym: continue, keep, keep on
verb.
secure and keep for possible future use or application
The landlord retained the security deposit|I reserve the right to disagree
verb.
keep in one's mind
I cannot retain so much information