'Old' has two possible antonyms: 'young' and 'new'.

old的反义词可能有两个：young和new。

Small and big are antonyms.

小和大是反义词。

Small and big are antonyms.

快乐是悲哀的反义词。

A thesaurus is a book of synonyms and antonyms.

同类语词典是一本拥有同义词和反义词的书。

How can you find antonyms in the thesaurus?

你怎么能在同义词典中发现反义词呢？