1640s, "state of being unsafe," also "lack of assurance or confidence, apprehension," from Medieval Latin insecuritas, from insecurus (see insecure). Specific psychological sense is by 1917.
Entries linking to insecurity
insecure adj.
1640s, "unsafe," also "not fully assured, not free from fear or doubt," from Medieval Latin insecurus, from in- "not" (see in- (1)) + Latin securus (see secure (adj.)). Psychological sense dates from 1935. (insecurity in the psychological sense dates from 1917.) Related: Insecurely.