New Living Translation
There are three things that make the earth tremble— no, four it cannot endure:

American Standard Version
For three things the earth doth tremble, And for four, which it cannot bear:

Berean Study Bible
Under three things the earth trembles, under four it cannot bear up:

Douay-Rheims Bible
By three things the earth is disturbed, and the fourth it cannot bear:

English Revised Version
For three things the earth doth tremble, and for four, which it cannot bear:

King James Bible
For three things the earth is disquieted, and for four which it cannot bear:

World English Bible
"For three things the earth tremble, and under four, it can't bear up:

Young's Literal Translation
For three things hath earth been troubled, And for four -- it is not able to bear:

Proverbs 30:21 Additional Translations ...