re·search (rĭ-sûrch, rēsûrch′)
1. Careful study of a given subject, field, or problem, undertaken to discover facts or principles.
2. An act or period of such study: her researches of medieval parish records.
v. re·searched, re·search·ing, re·search·es
To engage in or perform research.
1. To study (something) thoroughly so as to present in a detailed, accurate manner: researching the effects of acid rain.
2. To do research for: research a magazine article.
[Obsolete French recerche, from recercher, to search closely, from Old French : re-, re- + cerchier, to search; see SEARCH.]
re·searcher, re·searchist n.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.