Tā zǒngshì biǎoxiàn de hěn jīnchí, bù qīngyì liúlù gǎnqíng.
She always appears very reserved and doesn't easily show her feelings.
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usage
矜持 usually carries a positive or neutral connotation, suggesting dignified self-restraint rather than coldness. It is more commonly used of women in traditional contexts, but applies broadly. Contrast with 冷漠 (cold, indifferent), which is negative.
