Meaning of “insecure” - Learner’s Dictionary

insecure

adjective uk us /ˌɪnsɪˈkjʊər/
WORRIED

having no confidence in yourself and what you can do:

a shy, insecure teenager
NOT SAFE

not safe or protected:

Many of our staff are worried because their jobs are insecure.
insecurely adverb
insecurity uk us /ˌɪnsɪˈkjʊərəti/ noun [ U, C ]

(Definition of “insecure” from the Cambridge Learner’s Dictionary © Cambridge University Press)