Answer:
The meaning of the word 'aloof' would be unfriendly.
Explanation:
Thesaurus is the tool where you can find synonyms for a word, and even antonyms.
Although you can find synonyms in a regular dictionary as well, thesauri are better when it comes to that.
The answer is C. "It's time for you to get ready," Mrs. O'Reilly told us.