"rehashes" in the noun sense
1. rehash
old material that is slightly reworked and used again
"merely a dull rehash of his first novel"
"rehashes" in the verb sense
1. rehash
present or use over, with no or few changes
2. retrograde, rehash, hash over
go back over
"retrograde arguments"
Source: WordNet® (An amazing lexical database of English)
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