| insecure | (adjective) lacking self-confidence or assurance | - |
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| (adjective) lacking in security or safety | Synonyms: unsafe |
| (adjective) not firm or firmly fixed; likely to fail or give way | - |
| (adjective) not safe from attack | Synonyms: unsafe |
| obscure | (adjective) difficult to find | Synonyms: hidden |
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| (adjective) marked by difficulty of style or expression | Synonyms: dark |
| (adjective) not drawing attention | Synonyms: unnoticeable |
| (adjective) not famous or acclaimed | Synonyms: unknown, unsung |
| (adjective) not clearly expressed or understood | Synonyms: vague |
| (adjective) remote and separate physically or socially | Synonyms: apart, isolated |
| secure | (adjective) free from fear or doubt; easy in mind | Synonyms: unafraid, untroubled |
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| (adjective) free from danger or risk | - |
| (adjective) not likely to fail or give way | - |
| (adjective) immune to attack; incapable of being tampered with | Synonyms: impregnable, inviolable, strong, unassailable, unattackable |
| (adjective) financially safe | Synonyms: dependable, good, safe |