The English adjective frivolous comes from a Latin word meaning “silly,” “empty,” or “trifling.” A back-formation from frivolous produced the lesser-known verb frivol, meaning “to do something unimportant,” “to waste time,” or “to squander.” Someone...
rusticle n. a stalactite-like underwater accretion formed by cascading rust on sunken iron ships. Editorial Note: Nearly all citations found are associated with the RMS Titanic. Etymological Note: rust + icicle (source: Double-Tongued Dictionary)
