If you say that someone or something purports to do or be a particular thing, you mean that they claim to do or be that thing, although you may not always believe that claim.
例句
...a book that purports to tell the whole truth.聲稱要講述全部事實(shí)的一本書
英英詞典釋義
Adjective
1. commonly put forth or accepted as true on inconclusive grounds;
"the foundling's putative father""the reputed (or purported) author of the book""the supposed date of birth"