熬药

• 敖(roam; stroll)PHONETIC
• 灬(fire (variant))RADICAL

Cooking food over a slow fire for a long time until it's stewed tender is like wandering leisurely without hurrying.

• 艹(grass; plant)RADICAL
• 约(promise; bind)PHONETIC

Medicine is made from grass and plants, sounding like "wish" or "promise".