a.1.Made with, or requiring, great labor, pains, or diligence.
2.(Naut.) Likely or inclined to roll or pitch, as a ship in a heavy sea; having a tendency to labor.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
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The problems with these approaches in that they require laborsome knowledge engineering techniques to capture the domain specific knowledge and ontologies, which may not be pragmatic given millions of items that is common with E-commerce domains.