#1 insecure a. not firm or firmly fixed; likely to fail or give way; "the hinge is insecure". wn
#2 insecure a. [unsafe] lacking in security or safety; "his fortune was increasingly insecure"; "an insecure future". wn
#3 insecure a. lacking self-confidence or assurance; "an insecure person lacking mental stability". wn
#4 insecure s. [unsafe] not safe from attack. wn
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