YOU SAID:

i lack self confidence

INTO JAPANESE

自信を欠いています。

BACK INTO ENGLISH

Lacking confidence.

INTO JAPANESE

自信に欠けています。

BACK INTO ENGLISH

Lack of confidence.

INTO JAPANESE

自信の欠如。

BACK INTO ENGLISH

The lack of confidence.

INTO JAPANESE

自信の欠如。

BACK INTO ENGLISH

The lack of confidence.