say it: IN-suh-kyur
insecure is an adjective meaning "not firm or firmly fixed; likely to fail or give way". It carries 4 recorded senses.
lacking in security or safety
“his fortune was increasingly insecure”
“an insecure future”
lacking self-confidence or assurance
“an insecure person lacking mental stability”
not safe from attack
Definitions, synonyms and semantic relations for insecure come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.