大家好，請問一下
Webster's New Dictionary of Synonyms: A Dictionary of Discriminated Synonyms
with Antonyms and Analogous and Contrasted Words
使用介紹裡，有一句話不瞭解：
These aims are made practical and easy of attainment by an additional aid
which no work on synonyms has hitherto given the consultant.
which代替aid，但要怎麼還原回去呢？
是這樣嗎？
the aid has hitherto no work on synonyms given the consultant.
關鍵是，我不知道no work on synonyms代表什麼意思 @@a
附上照片圖檔，供參考。謝謝！
http://i.imgur.com/Kh6SnJm.jpg