Plural of cordiality: instances of warm and sincere friendliness, courtesy, or affection in dealings with others.
From cordiality (from cordial, from Latin cordialis meaning 'of the heart') plus the plural suffix -es. The word family all traces back to the Latin heart concept.
The plural form reminds us that warmth isn't one-size-fits-all—different relationships require different levels and types of cordialities, which is why some people are 'warm acquaintances' while others are 'best friends.'
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