This Poll:
All Polls:
lyfen
can any words use with hyphen ?
Lucy
These seem to be two different concepts to me. Cooperate is to work together in any circumstance, and co-operate is when two or more people operate a specific machinery together.
Ex.) The girl and boy cooperated to produce a lovely sand castle.
Ex.) The machine was so complicated to work on that Bill and Mary co-operated it.
mikey
I agree. They're two separate words. The hyphen causes you to focus on the word "operate".

RonBee
Does the use of a hyphen really prevent confusion in this case?
~R