Punctilious is a word that means exact or strict in the observation of amenities of conduct, formalitiesa and actions.
The way the word is used in a sentence is this way. He is an honest and very punctilious English man.
Meaning is a word that describes other words and give definition.
Sentence is a group of words together that usually have a subject and a verb to create it.
Antonyms are words that mean the opposite of another word.