insecure

形容词 insecure:

1. not firm or firmly fixed; likely to fail or give way
2. lacking in security or safety
   同义词：unsafe
3. lacking self-confidence or assurance
4. not safe from attack
   同义词：unsafe

in.se.cure

adj.（形容词）
Not sure or certain; doubtful:
不可靠的：不肯定的；怀疑的：
例句：
unemployed and facing an insecure future.
失业并面临无保障的未来

Inadequately guarded or protected; unsafe:
无保障的：无足够的守卫或保护的；不安全的：
例句：
A shortage of military police made the air base insecure.
缺乏武警使得空军基地不很安全

Not firm or fixed; unsteady:
不稳固的，不牢固的：
例句：
an insecure foothold.
不稳固的立足点

Lacking emotional stability; not well-adjusted:
不稳定的：感情不稳定的；没有调整好的：
例句：
an insecure relationship.
不稳定的关系

Lacking self-confidence; plagued by anxiety:
心神不定的：缺乏自信心的；为忧虑所扰的：
例句：
had always felt insecure at parties.
在晚会上总觉得心神不定

【引伸】
in.secure.ly
adv.（副词）
in.secure.ness
n.（名词）
in.secu.rity