insecure

adjectives

not firm or firmly fixed; likely to fail or give way
"the hinge is insecure"
antonym
see also
not firmly placed or set or fastened
lacking in security or safety
"his fortune was increasingly insecure"; "an insecure future"
is derived from
is derived from
antonym
lacking self-confidence or assurance
"an insecure person lacking mental stability"
is derived from
is derived from
antonym
is similar to
anxious or nervous to an excessive degree
is similar to
lacking boldness or confidence
not safe from attack
is derived from
is derived from