苦口 Traditional form: 苦口 Pinyin (reading): kǔkǒu Definitions: lit. bitter taste (cf good medicine tastes bitter 良藥苦口/良药苦口) fig. earnestly (of warning, advice) Characters: 苦 - bitter; hardship, suffering 口 - mouth; entrance, gate, opening Traditional characters: 苦 - bitter; hardship, suffering 口 - mouth; entrance, gate, opening