yān:* 煙草。 yū:* 枯萎。 yù:* 臭草
to fade; withered or dried leaves; tobacco (used for U+70DF 烟 and U+7159 煙)
Standardized 221–206 BCE (Qin); developed earlier in Qin
The standardized seal script promulgated after Qin’s unification, based on earlier Qin seal forms and used as an empire-wide norm.Wikipedia ->