retro-retro- /retrəʊ, -trə $ -troʊ, -trə/ prefix 
back towards the past or an earlier state: 
retroactive legislation (=laws which have an effect on things already done) a retrograde step (=returning to a worse state)
back towards the past or an earlier state: retroactive legislation (=laws which have an effect on things already done) a retrograde step (=returning to a worse state)- confederacy
- confederate
- Confederate flag
- confederation
- Confederation of British Industry
- confer
- conference
- conference call
- conferment
- confess
- confessed
- confession
- confessional
- confessional TV
- confessor
- confetti
- confidant
- confidante
- confide
- confidence
- confidence-building
- confidence trick
- confidence trickster
- confident
- confidential