• WordNet 3.6
    • n operoseness the quality of requiring extended effort
    • ***
Century Dictionary and Cyclopedia
    • n operoseness The state of being operose or laborious.
    • ***


In literature:

But what an operose method!
"Essays, Second Series" by Ralph Waldo Emerson
In the execution, it was an operose business on both sides of the water.
"The Works of the Right Honourable Edmund Burke, Vol. IV. (of 12)" by Edmund Burke