quietly and steadily persevering especially in detail or exactness
"a diligent (or patient) worker"
"with persevering (or patient) industry she revived the failing business"
characterized by care and perseverance in carrying out tasks
"a diligent detective investigates all clues"
"a diligent search of the files"
Performing with industrious concentration; hard-working and focused.
"The diligent researcher spent weeks meticulously verifying every source before finalizing her thesis."