Englishpainstaking
adjective
careful, meticulous, thorough, assiduous, sedulous, attentive, diligent, industrious, laborious, hard-working, conscientious, ultracareful, punctilious, scrupulous, demanding, exacting, searching, close, elaborate, minute, accurate, correct, studious, rigorous, particular;
religious, strict;
pedantic, fussy.
▷antonyms careless, negligent, slapdash.