Refers to the sour taste of food or drink, such as citrus, vinegar, or fermented items.
The sourness of this lemon enhances the dish.
Some people dislike the acidity of yogurt.
Rare kanji spelling; the kana form is strongly preferred.
Ateji spelling; not recommended for learners.
Derived from the adjective 酸っぱい (sour) with the nominalizing suffix み, which turns adjectives into nouns expressing a degree or quality.