酸痛 Traditional form: 酸痛 Pinyin (reading): suāntòng Definitions: to ache Characters: 酸 - tart, sour; spoiled; acid 痛 - ache, pain; bitterness, sorrow; deeply, thoroughly Traditional characters: 酸 - tart, sour; spoiled; acid 痛 - ache, pain; bitterness, sorrow; deeply, thoroughly