Homonym: sour (Acidic)
The term "sour" often describes a taste that is sharp and tangy, like that of a lemon or lime. This flavor can make your mouth pucker and is commonly found in foods like pickles and sour candy. Sourness is one of the basic tastes, alongside sweet, salty, bitter, and umami, and it can add a refreshing contrast to richer flavors in dishes.
In addition to taste, "sour" can also describe a mood or atmosphere. When someone is feeling sour, they might be grumpy or irritable, much like how a sour expression can indicate displeasure. This emotional sourness can affect interactions with others, making conversations feel tense or uncomfortable.