"Bitter" is a taste sensation that is often described as sharp and unpleasant. It is one of the five basic tastes, alongside sweet, sour, salty, and umami. Foods like dark chocolate, coffee, and certain vegetables like kale can have a bitter flavor. This taste can sometimes be an acquired preference, as many people learn to enjoy it over time. In addition to its culinary meaning, "bitter" can also describe feelings of resentment or disappointment. For example, someone might feel bitter after losing a competition or experiencing a breakup. This emotional bitterness can linger, affecting relationships and overall happiness.