HSK 7-9
墨
mò名
ink stick; China ink; corporal punishment consisting of tattooing characters on the victim's forehead; surname Mo; abbr. for 墨西哥, Mexico
他研好墨才开始写字。
Tā yánhǎo mòcái kāishǐ xiězì.
He did not begin writing until he had ground the ink.
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Appears across levels (7-9) in the HSK 3.0 word list.