painstaking

US /ˈpeɪnzˌteɪ.kɪŋ/
UK /ˈpeɪnzˌteɪ.kɪŋ/
"painstaking" picture
1.

minucioso, esmerado, laborioso

done with great care and thoroughness

:
The artist made a painstaking effort to capture every detail.
El artista hizo un esfuerzo minucioso para capturar cada detalle.
It took years of painstaking research to complete the book.
Se necesitaron años de investigación minuciosa para completar el libro.