GOD'S WORD® Translation
Endure until your testing is over. Then you will be mature and complete, and you won't need anything.

American Standard Version
And let patience have its perfect work, that ye may be perfect and entire, lacking in nothing.

Berean Study Bible
Allow perseverance to finish its work, so that you may be mature and complete, not lacking anything.

Douay-Rheims Bible
And patience hath a perfect work; that you may be perfect and entire, failing in nothing.

English Revised Version
And let patience have its perfect work, that ye may be perfect and entire, lacking in nothing.

King James Bible
But let patience have her perfect work, that ye may be perfect and entire, wanting nothing.

World English Bible
Let endurance have its perfect work, that you may be perfect and complete, lacking in nothing.

Young's Literal Translation
and let the endurance have a perfect work, that ye may be perfect and entire -- in nothing lacking;

James 1:4 Additional Translations ...