Prosecuted with careful attention and effort; careful; painstaking; not careless or negligent.

Interestedly and perseveringly attentive; steady and earnest in application to a subject or pursuit; assiduous; industrious.

characterized by care and perseverence in carrying out tasks; "a diligent detective investigates all clues"; "a diligent search of the files"

quietly and steadily persevering especially in detail or exactness; "a diligent (or patient) worker"; "with persevering (or patient) industry she revived the failing business"