羽茎

羽 = 习 : Yu the Great is studying the structure of a feather inside the space station.

茎 = 艹 + 圣 : Joan of Arc (ji) wrote to Father Christmas (圣) that she wants a condom (茎) for her penis (茎), but instead Father Christmas only understood she wants a lot of stems (茎) so in front of the engine ((e)ng1) he hands her a sheet of artificial lawn (艹).