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cardinal sin

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noun [countable] cardinal sin pronunciation in British English
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singularcardinal sin
pluralcardinal sins
  1. 1
    humorous something that is considered to be bad or wrong and that you must not do

    He committed the cardinal sin of forgetting their anniversary.

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… a teaching method in which groups of children learn independently using a computer linked to the internet

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bankster

a derogatory word used for referring to people in the banking and investment industry who are thought of as taking serious risks in order to increase their own earnings …

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