Amazing Chinese Characters (444) Grind - 研

 The big seal script of character Grind is

The left is character Stone, the right 干干 means a mold, here is stone mortar. The character means using stone mortar to grind something. Chinese has used stone mortar to grind Chinese medicine for thousands years. 

This kind

or

This kind

The small seal script of the character is

Similar to big seal script.

The clerical script of the character is

The left  石 is character Stone, the right two 干s become 开, which is character Open. It should be a miswritten because there is no meaning of Open in this character.

The song typeface of the character is

研

Same as clerical script.

The Pinyin of the character is Yan2.