1. Not sure or certain; doubtful: unemployed and facing an insecure future.
2. Inadequately guarded or protected; unsafe: A shortage of military police made the air base insecure.
3. Not firm or fixed; unsteady: an insecure foothold.
a. Lacking stability; troubled: an insecure relationship.
b. Lacking self-confidence; plagued by anxiety: had always felt insecure at parties.
in′se·curi·ty (-kyrĭ-tē) 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.