from Wiktionary, Creative Commons Attribution/Share-Alike License
- adv. With great expenditure of effort, in a manner requiring much labor.
from The Century Dictionary and Cyclopedia
- In a laborious manner; with labor, toil, or difficulty.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adv. in a laborious manner
laborious + -ly (Wiktionary)