2 sentences for 研 (yán — grind)

1. 把中药研成面子。

   bǎ zhōng​yào yán chéng miàn​zi.

   Grind the Chinese medicine into powder.

   Source: Dong Chinese Dictionary

2. 中医师建议将这几味药材研成细末后再冲服。

   zhōng​yī​shī jiàn​yì jiāng zhè jǐ wèi yào​cái yán chéng xì mò hòu zài chōng​fú.

   The Chinese medicine doctor suggested grinding these herbs into a fine powder before taking them with water.

   Source: Dong Chinese Dictionary