NAS: for a wide door for effective service has opened to me, and there are many adversaries.
KJV: For a great door and effectual is opened unto me, and there are many adversaries.
GWT: I have a great opportunity to do effective work here, although there are many people who oppose me.
ASV: for a great door and effectual is opened unto me, and there are many adversaries.
BBE: For a great and important door there is open to me, and there are a number of people against me.
DBY: For a great door is opened to me and an effectual one, and the adversaries many.
DRB: For a great door and evident is opened unto me: and many adversaries.
WBS: For a great door and effectual is opened to me, and there are many adversaries.
WEB: for a great and effective door has opened to me, and there are many adversaries.
YLT: for a door to me hath been opened -- great and effectual -- and withstanders are many.