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retrial
retribution
retrieval
retrieve
retriever
retro
retro-
retro-engine
retroact
retroaction
retroactive
retroactive inhibition
retrocede
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retrofire
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retroact

ret·ro·act [ rèttrō ákt ] (past and past participle ret·ro·act·ed, present participle ret·ro·act·ing, 3rd person present singular ret·ro·acts)


intransitive verb 
Definition:
 
1. be in opposition: to act in a way that opposes something else

2. apply to past: to apply to things that have happened in the past

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