尽管外表光鲜，许多人仍与根深蒂固的不安全感作斗争。

Many people struggle with deep-seated ___insecurity despite outward success.

我们不得不忍受对未来一无所知的不安全感。

We have to live with the ___insecurity of not knowing what the future holds.

她不断寻求肯定，源于一种深刻的不安全感。

Her constant need for reassurance stems from a profound sense of ___insecurity.