punc·til·i·ous 
/ˌpʌŋkˈtɪlijəs/ adjective
/ˌpʌŋkˈtɪlijəs/ adjective [more punctilious; most punctilious] formal : very careful about behaving properly and doing things in a correct and accurate way
▪ She's very punctilious about grammar. ▪ a punctilious [=meticulous] caretaker
▪ She's very punctilious about grammar. ▪ a punctilious [=meticulous] caretaker
— punc·til·i·ous·ly adverb
▪ They do their jobs punctiliously.
▪ They do their jobs punctiliously.
— punc·til·i·ous·ness noun [noncount]
