rhetoric
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noun
the art of effective or persuasive speaking or writing, especially the use of figures of speech and other compositional techniques:
(特別な効果を狙った)話術, 言葉遣い, レトリック; 修辞学［法］; 雄弁術.
e.g. he is using a common figure of rhetoric, hyperbole.
language designed to have a persuasive or impressive effect on its audience, but often regarded as lacking in sincerity or meaningful content:
｟非難して｠ (うわべだけの)美辞麗句; 誇張した表現
e.g. all we have from the Opposition is empty rhetoric.
ORIGIN
Middle English: from Old French rethorique, via Latin from Greek rhētorikē (tekhnē) ‘(art) of rhetoric’, from rhētōr ‘rhetor’.