xīn has both literal and figurative reach. Concrete fragrance:
馨香 (lingering perfume — slightly more poetic than plain
香). The everyday compound everyone knows is
温馨 'warm and tender' — used of homes, atmospheres, gestures, family moments. It is one of the most common positive feeling-words in modern Chinese marketing and lifestyle writing. Older literary use:
德馨 (a fragrant virtue, i.e. a reputation that carries far), preserved in Liu Yuxi's
《陋室铭》 (Inscription on a Humble Dwelling).