悄声

悄 = 忄 + 肖 : The Queen of Hearts (qi) wants it to be quiet (悄) in the aorta (ao3), so she threatens the Little Prince (肖) with a flail (忄) to make him be quiet. It also makes him very sad (悄).

声 = 士 + 尸 + 丨 : Sherlock Holmes (sh) hears the terrifying sound (声) of bone (丨) on stone in front of the engine ((e)ng1), and he's sure that there must be a ghost (尸). Indeed it's only the bachelor (士) who wants to scare Sherlock.