disassiduity

From dis- +‎ assiduity.

disassiduity (uncountable)

1. Lack of assiduity or care.
   • a. 1639, Henry Wotton, a letter to Edmund Bacon

     some argue upon it, that disassiduity in a Favorite, is a degree of declination, but of this there is no appearance

• “disassiduity”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.