1. (

• diligent ,
• persevering

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

2. (

• diligent

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