Painstaking means done with very great care over every single detail. Slow, and nothing skipped.
It is a compliment about method rather than talent, and painstaking research, painstaking restoration and painstaking detail are all standard. The word is literally taking pains, which is exactly what it describes, and the pains here means trouble rather than hurt. It suits work that could not be hurried without being ruined. Meticulous and thorough are its close neighbours.
1adjectivepainstakingDone with great care and attention to detail.
“It was painstaking work and it took him four years.”
From pains + taking; see take pains. The pronunciation which dominates in the United States suggests a of the word as pain + staking.
Etymology from Wiktionary, CC BY-SA