GOD'S WORD® Translation
I know that you are stubborn. Like iron, you are hardheaded. Like bronze, nothing gets through your thick skull.

American Standard Version
Because I knew that thou art obstinate, and thy neck is an iron sinew, and thy brow brass;

Berean Study Bible
For I knew that you are stubborn; your neck is iron and your forehead is bronze.

Douay-Rheims Bible
For I knew that thou art stubborn, and thy neck is as an iron sinew, and thy forehead as brass.

English Revised Version
Because I knew that thou art obstinate, and thy neck is an iron sinew, and thy brow brass;

King James Bible
Because I knew that thou art obstinate, and thy neck is an iron sinew, and thy brow brass;

World English Bible
Because I knew that you are obstinate, and your neck is an iron sinew, and your brow brass;

Young's Literal Translation
From my knowing that thou art obstinate, And a sinew of iron thy neck, And thy forehead brass,

Isaiah 48:4 Additional Translations ...