1. A false boasting or claim, especially one detrimental to the interests of another.
2. Extreme restlessness or tossing in bed, as can occur with some forms of acute disease.
[Medieval Latin iactitātiō, iactitātiōn-, false declaration, from Latin iactitātus, past participle of iactitāre, to utter, frequentative of iactāre, to boast, frequentative of iacere, to throw; see yē- in the Appendix of Indo-European roots.]
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.