English Standard Version
for a wide door for effective work has opened to me, and there are many adversaries.

American Standard Version
for a great door and effectual is opened unto me, and there are many adversaries.

Berean Study Bible
because a great door for effective work has opened to me, even though many oppose me.

Douay-Rheims Bible
For a great door and evident is opened unto me: and many adversaries.

English Revised Version
for a great door and effectual is opened unto me, and there are many adversaries.

King James Bible
For a great door and effectual is opened unto me, and there are many adversaries.

World English Bible
for a great and effective door has opened to me, and there are many adversaries.

Young's Literal Translation
for a door to me hath been opened -- great and effectual -- and withstanders are many.

1 Corinthians 16:9 Additional Translations ...