sour or tart in taste or smell, like vinegar; spoiled or fermented food

sweet; having a taste like sugar or honey

having a sharp, pungent taste like that of coffee or unsweetened cocoa; the opposite of 甜 tián

hot; peppery; pungent like chili, garlic, or ginger

(bound form) sick at heart; grieved; distressed, such as in 心酸 xīn​suān

pleasant or agreeable; used to describe a person's speech, a look, or a lifestyle

suffering; pain; a difficult or miserable situation or circumstance

vicious; cruel; heartless, as in the phrase 心狠手辣 xīn​hěn​shǒu​là