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HYPHEN
WORDNET DICTIONARY
CIDE DICTIONARY
OXFORD DICTIONARY
THESAURUS

WORDNET DICTIONARY

Noun rehash has 1 sense

• rehash(n = noun.communication) Array - old material that is slightly reworked and used again; "merely a dull rehash of his first novel"
is a kind of material
Derived forms verb rehash₂, verb rehash₁

Verb rehash has 2 senses

• rehash(v = verb.consumption) Array - present or use over, with no or few changes; Array
is one way to recycle, reprocess, reuse
Derived form noun rehash₁
Sample sentence:
Somebody ----s something

• rehash(v = verb.communication) hash over, retrograde - go back over; "retrograde arguments"
is one way to recap, recapitulate
Derived form noun rehash₁
Sample sentence:
Somebody ----s something

CIDE DICTIONARY

OXFORD DICTIONARY

THESAURUS

rehash

battologize, copy, critique, dwelling upon, elaboration, fill, give an encore, go over, go through, going over, iterate, iteration, pad, paraphrase, practice, practicing, reaffirm, reaffirmation, rearrange, rearrangement, reassert, recap, recapitulate, recapitulation, recital, recite, recount, recountal, recounting, redo, redoing, rehearsal, rehearse, reissue, reiterate, reiteration, rephrase, reprint, reshuffle, reshuffling, restate, restatement, resume, retail, retell, retelling, reuse, review, reword, rewording, rework, run over, say over, say over again, sum up, summarize, summary, summing up, tautologize

For further exploring for "rehash" in Webster Dictionary Online