不可数名词：

苦味，悲痛，怨恨

词形变化

形容词比较级more_bitterer，more_bitterest

副词bitterly

名称bitterness

时态bittered，bittering，bitters

英语解释

the property of having a harsh unpleasant taste

the taste experience when quinine or coffee is taken into the mouth

a feeling of deep and bitter anger and ill-will

a rough and bitter manner