1. Not returned in kind
   - unanswered, unrequited

See also: nonreciprocal

• police station
• police van
• police wagon
• police work
• policeman
• policeman bird
• policewoman
• policy
• policy change
• policy maker
• policy-making
• policyholder
• polio
• poliomyelitis
• Polioptila
• poliosis
• poliovirus
• poliovirus vaccine
• polis
• polish
• Polish monetary unit
• Polish notation
• polish off
• polish up
• polished