Of a person, taking their work seriously and doing it well and rapidly.
habitually working diligently and for long hours.
Tending to persevere.
characterized by hard work and perseverance
Characterized by perseverance; persistent.
quietly and steadily persevering especially in detail or exactness;
‘a diligent (or patient) worker’; ‘with persevering (or patient) industry she revived the failing business’;