niepewny siebie v angličtině:

His short stature makes him feel insecure.

She's very insecure.

1. Isn't that a very insecure profession? / 2. I don't know why you're still so insecure.

you have nothing to be insecure about, Anna knows that I'm very insecure about my back, many of our staff are worried cause their jobs are insecure

Maybe if you'd put in some effort you wouldn't be so insecure.

Insecure people have little confidence and are uncertain about their own abilities or if other people really like them: He still feels insecure about his ability to do the job. [+ about] / How can you be so insecure?

He still feels insecure about his ability to do the job. [+ about] / How can you be so insecure? / Cellular phones are inherently insecure, as anyone can listen to and record conversations. / Isn't that a very insecure profession?

Being insecure makes you an easy target for mean people.

My daughter felt very insecure when she went to a new school.

Her ex-boyfriend was so insecure he’d check her emails every day.

But in fact he always seemed insecure underneath

Hannah isn’t a confident child, I think she’s insecure.

Eleanor was shy and insecure as a child.

He is insecure, he always worries about what people think of him.

I think she's insecure and probably very impressionable.

She was modest and diffident about her achievements.

for someone who makes a living performing for other people, the actress is remarkably diffident in real life

He was too diffident to express his opinion.

For those who are rather diffident about facing a public examination, there are helpful ‘proxy writers’ available