- constant in effort to accomplish something; attentive and persistent in doing anything: a diligent student.
- done or pursued with persevering attention; painstaking: a diligent search of the files.
Origin of diligent
1. See busy.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- careful and persevering in carrying out tasks or duties
- carried out with care and perseverancediligent work
C14: from Old French, from Latin dīligere to value, from dis- apart + legere to read
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for undiligent
mid-14c., from Old French diligent (14c.), from Latin diligentem "attentive, assiduous" (see diligence). Related: Diligently.
Online Etymology Dictionary, © 2010 Douglas Harper