墨水 (mò shuǐ) means “ink”. It is an HSK 6 Chinese word in the HSK 3.0 vocabulary.
Measure word: 瓶
Practice each character:
钢笔的墨水用完了。
Gāngbǐ de mòshuǐ yòng wán le.
The fountain pen has run out of ink.
Updated: 2026-07-18