lack confidence
be lacking in confidence

Older people may have the necessary skills and ability but possibly lack confidence.

They are a team that lacked confidence, especially on defense.

Someone asked if he found himself lacking confidence in one set of plays over another.

But many rural women, who have not had formal education, often lack confidence to speak out.

He is equally comfortable with the ball at his feet and does not lack confidence.

When Perry gets on the green, he does not lack confidence.

They lack confidence when it comes to making good decisions about money.

No matter how smart they were, many of them seemed to lack confidence.

Consumers often lack confidence because they do not know what is happening.