painstakingly
adv. B2 Upper Intermediate US //ˈpeɪnˌsteɪkɪŋɫi// UK //pˈeɪnsteɪkɪŋli// painstak·ing·ly
adv. to do something with great care and attention to detail. You use this when someone works very slowly and carefully to make sure everything is perfect.
adv. in a manner requiring great care, effort, and attention to detail. Often used to describe a process that is slow but thorough.
She painstakingly cleaned the old painting for hours.
The researchers painstakingly analyzed every piece of evidence before they could reach a final conclusion.
The restoration of the cathedral was painstakingly carried out over several decades, with every stone and carving returned to its original position with surgical precision.