墨(mò) - ink (for calligraphy and painting); ink stick in Mandarin

写xiě毛máo笔bǐ字zì要yào用yòng墨mò。

You need ink to write with a brush.

这zhè块kuài墨mò是shì爷yé爷ye留liú下xià来lái的de。

This ink stick was handed down from my grandfather.

墨mò是shì黑hēi色sè的de。

Ink is black.

爷yé爷ye每měi天tiān早zǎo上shang先xiān磨mó墨mò，再zài写xiě字zì。

Every morning my grandfather grinds his ink before he starts writing.

写xiě完wán以yǐ后hòu，要yào等děng一yí会huì儿r墨mò才cái干gān。

After you finish writing, you have to wait a while for the ink to dry.