a tool or accessory used to froth milk and other liquids; a fitting on a tap that ensures a straight and evenly pressured stream of water; a tap aerator; a substance used to create froth
to be flecked (with white horses, white caps); to foam, froth; (of hills) to roll; to be flecked with fleecy clouds; to practice the occupation of an itinerant shepherd; to denounce
perpetual motion (motion of some hypothetical device that continues forever with no external input of energy, in violation of the laws of thermodynamics)