spec·u·la·tive (spĕkyə-lə-tĭv, -lā′-)
a. Given to, characterized by, or based upon speculation or conjecture: speculative articles about the origin of language.
b. Expressing inquisitive interest: raised a speculative eyebrow.
a. Engaging in, given to, or involving financial speculation: speculative brokers; speculative stocks.
b. Spent in speculation: speculative funds.
c. Involving chance; risky: speculative business enterprises.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 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.