勤勉な (translations)→ hardworking unremitting
周到な (translations)→ best carefully cautious elaborate good meticulous
念の入った (translations)→ laborious politeness
念入りな (translations)→ diligent
粘り強い (translations)→ dogged persevering resilient
綿密な (translations)→ detailed scrupulously
sedulously
