cliff: [OE] Cliff comes from a prehistoric Germanic *kliban, of unknown origin (German klippe ‘crag’ is a collateral relative). The compound cliffhanger seems to have originated in the USA in the 1930s; it comes from the serial movies then popular, in which at the end of each episode the hero or heroine was left in some perilous situation, such as hanging off the edge of a cliff, not resolved until the next instalment. [cliff etymology, cliff origin, 英语词源]