隐姓埋名

隐 = 急 + 阝 : The pope (阝) and Maud Younger (y) both need to go to the bathroom in the encampment ((e)n3) urgently (急), but they both forgot the secret (隐) pass phrase so they cannot open the door.

姓 = 女 + 生 : Marie Curie (xi) finds baby Bessie (女) lying in a cradle (生) in the engine's bathroom ((e)ng4). Marie decides to give Bessie the surname (姓) "Coleman" because she thinks it will fit very well.

埋 = 土 + 里 : As a sign of peace Mahatma Gandhi (m) buries (埋) a sunflower (里) under some earth (土) in the airplane's kitchen (ai2).

名 = 口 + 夕 : Mnemonic symbol: a name badge (from 名牌).

Marilyn Monroe (mi) prepared a mandarin (口) for her bat (夕) in the engine's kitchen ((e)ng2) and put her little darling's name badge (名) in front of it.