芯 xīnxìn HSK7 pith from rush (juncus effusus) Definitions Defs Origin Strokes Stroke Words Sentences Sents Showing: All "xin4" meanings All meanings 2 xīn 1 pith 1xìn 1 core 1 1 sentence for 芯 (xìn) 这支圆珠笔的笔芯已经没有墨水了。 zhè zhī yuánzhūbǐ de bǐ xìn yǐjīng méiyǒu mòshuǐ le. The refill of this ballpoint pen has run out of ink. Source: Dong Chinese Dictionary