Antonym: secure. Similar words: insecurity, secure, security, insect, consecutive, in secret, sinecure, insecticide. Meaning: [‚ɪnsɪ'kjʊr /-'kjʊə] 
adj. 1. not firm or firmly fixed; likely to fail or give way 2. lacking in security or safety 3. lacking self-confidence or assurance 4. not safe from attack.
adj. 1. not firm or firmly fixed; likely to fail or give way 2. lacking in security or safety 3. lacking self-confidence or assurance 4. not safe from attack. 
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1. Most mothers are insecure about their performance as mothers.
2. He's very insecure about his appearance.
3. She felt nervous and insecure.
4. The foundations of the house are insecure.
5. She's very insecure about her appearance.
6. Beneath the surface calm, she felt very insecure.
7. Sybil was very insecure and needy.
8. She's an insecure child who craves attention .
9. As an artist he was always financially insecure.
10. She was insecure, mixed-up and angry.
11. He felt a bit insecure about being left alone.
12. Insecure doors and windows make life easy for burglars.
13. She feels very insecure about her marriage.
14. She felt lonely and insecure away from her family.
15. He seems confident but deep down he's quite insecure.
16. Many of them work in low-paid, insecure jobs.
17. We've gone through a few financially insecure years.
18. The situation is still insecure, with many of the rebels roaming the streets.
19. People feel pinched in their pocketbooks and insecure about their futures.
20. She's actually rather insecure, and her rudeness is just a defence mechanism.
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21. He feels insecure about his body, so he wears a shirt at the beach.
22. She is very insecure and constantly seeks reassurance that he loves her.
23. Jobs nowadays are much more insecure than they were ten years ago.
24. He still feels insecure about his ability to do the job.
25. He's obviously insecure about money.
26. I wonder what it was about her upbringing that made her so insecure.
27. Nations which are not self-sufficient in energy will face an insecure future.
28. As an atheist, he believes that religion is just an emotional crutch for the insecure.
29. His diaries show him to have been an extremely insecure person.
30. His arrogance is just a front. Deep down he's really insecure.
More similar words: insecurity, secure, security, insect, consecutive, in secret, sinecure, insecticide, insectivorous, collective security, national security council, social security administration, recur, secular, persecute, prosecute, prosecutor, persecution, recurrent, precursor, prosecution, consecrate, open secret, recurrence, rinse, cure, insert, cured, secularization, consecration.