1. Opinion or judgment based on inconclusive or incomplete evidence; guesswork.
2. An opinion or conclusion based on guesswork: The commentators made various conjectures about the outcome of the next election.
v. con·jec·tured, con·jec·tur·ing, con·jec·tures
To judge or conclude by conjecture; guess: "From the comparative silence below ... I conjectured that Mr Rochester was now at liberty" (Charlotte Brontë).
To make a conjecture.
[Middle English, from Old French, from Latin coniectūra, from coniectus, past participle of conicere, to infer : com-, com- + iacere, to throw; see yē- in the Appendix of Indo-European roots.]
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.