Webster's English Dictionary

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research

re.search \ri-'s*rch, 're--.\ n [MF recerche, fr. recerchier to investigate 
   thoroughly, fr. OF, fr.] re- + cerchier to search - more at SEARCH 1: 
   careful or diligent search  2: studious inquiry or examination; esp : 
   investigation or experime ntation aimed at the discovery and interpretation 
   of facts, revision of accepted theories or laws in the light of new facts, 
   or practical application of such new or revised theories or laws - research 
   vb