foghorn

the word 'foghorn' is a transparent english compound, formed by directly combining two old english/germanic elements. 'fog' originates from early modern english, likely from scandinavian sources such as old norse 'fok' meaning 'spray, drift', describing the obscuring weather condition. 'horn' has deep proto-indo-european roots in 'ker-', meaning 'horn, head', which evolved into the animal part and later any signaling instrument made from or resembling it. the compound's logic is perfectly literal: it is a horn (a sound-producing instrument) specifically used in conditions of fog. its meaning later extended metaphorically to describe any similarly loud, blaring sound, particularly an unpleasantly loud human voice.

Structure: fog + horn fog (old english, danish) - thick mist or cloud of tiny water droplets; the meteorological condition. horn (old english, germanic) - a hard, pointed, often curved outgrowth on the head of an animal; an instrument for sounding a warning or signal.