Select the synonym of elate

Select the most appropriate proverb/idiom that can substitute the highlighted segment in the given sentence.
After his repeated warnings went unheard, the teacher decided to stop trying to discipline the unruly students, realising that it is useless to offer advice to someone who refuses to listen.

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The proposal was denouncad by one and all.

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His pugnacious response to the criticism only intensified the argument.

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Mr. Satish Gujral was ___________ both as a social worker and as a portrait painter.

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A person who writes books, articles, or stories as a profession

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The school's ____ gave a speech on moral values, explaining how living by a good ____ shapes character.

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Hustle

Select the most appropriate ANTONYM of the given word.
Intrepid

Select the most appropriate meaning of the highlighted word in the given sentence.
Don't you think she is too meretricious in her manner?

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The act of expressing profound and often bitter grief or lamentation, especially in a public or formal setting, for a loss that is perceived to be irrecoverable