punctilious

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punctilious /ˌpʌŋkˈtɪlijəs/ adjective
punctilious
/ˌpʌŋkˈtɪlijəs/
adjective
Learner's definition of PUNCTILIOUS
[more punctilious; most punctilious] formal
: very careful about behaving properly and doing things in a correct and accurate way

— punctiliously

adverb

— punctiliousness

noun [noncount]