from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Conscientious and unremitting diligence.
from The Century Dictionary and Cyclopedia
- n. The quality of being assiduous; constant or diligent application.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. great and constant diligence and attention
assiduous + -ness (Wiktionary)