Hi, Do I need to hyphenate the phrase "invitation only-working group" in the sentence "This is an invitation only working group"? I'm sure the intention is 'invitation - only working group", ie a group that you can join only by invitation. A 'working - only' group sounds like a group that only works, and never goes out for a few beers.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.