Third person singular present of research, meaning to investigate systematically. Also the plural noun form referring to multiple research projects or studies.
From Middle French 'recerchier,' meaning 'to seek again' or 'to search closely.' The prefix 're-' (again) plus 'cerchier' (to search) emphasized thorough, repeated investigation.
The word literally means 'searching again' - true research involves going back over the same ground multiple times, each pass revealing new details. This repetitive aspect is built into the very etymology of scientific inquiry.
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