aigre

The French adjective "aigre" primarily means "sour" or "acidic" when describing taste or smell. It is commonly used for foods, drinks, or odors that have a sharp, tangy, or unpleasantly sour characteristic.

Example:

• Un fruit aigre — a sour fruit
• Une odeur aigre — a sour or acrid smell

Figurative meanings:

• It can describe a person's mood or tone as bitter, harsh, or resentful.
• For example, une réponse aigre can mean a sharp or biting reply.

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Synonyms and differences:

1. Acide:

• Means "acidic" or "sour" in a more scientific or culinary sense.
• Often more precise when describing pH or chemical acidity.
• Example: le goût acide du citron (the acidic taste of lemon).

2. Amer:

• Means "bitter," which is different from "sour."
• Bitter tastes come from substances like coffee or some medicines, while sour is more like lemon or vinegar.

3. Vinaigré:

• Means "vinegary" or having the taste or smell of vinegar. It falls into a specific type of sourness.

4. Désagréable:

• Means "unpleasant," more general to describe any unpleasantness that might be related to taste, smell, or mood. Not a direct synonym but sometimes overlaps in meaning when applied figuratively.

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Summary:

• "Aigre" refers to a sharp, sour taste, odor, or an unpleasant tone in mood or speech.
• It is more informal and general than "acide," which is scientific, and different from "amer," which means bitter.
• Context is important to determine whether it relates to taste, smell, or an emotional tone.