CONK

I. noun Etymology: perhaps from conch Date: 1812 nose , II. transitive verb Etymology: English slang ~ head Date: 1821 to hit especially on the head ; knock out , III. noun Etymology: probably alteration of conch Date: 1851 the visible fruiting body of a bracket fungus, ~y adjective IV. intransitive verb Etymology: probably imitative Date: 1918 break down , 2. faint , to go to sleep, die , V. transitive verb Etymology: probably by shortening & alteration from congolene preparation used for straightening hair Date: 1950 to straighten out (hair) usually by the use of chemicals, VI. noun Date: 1965 a hairstyle in which the hair is straightened out and flattened down or lightly waved