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Etiquette: Noun [uncountable]
Definition: the formal rules for polite behaviour in society or in a particular group
Sentence: strict rules of professional etiquette
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Despair: noun [uncountable] verb [intransitive]
1. a feeling that you have no hope at all.
2. be the despair of somebody old-fashioned to make someone feel very worried, upset, or unhappy.
3. to feel that there is no hope at all.