glüht

Glüht is the third-person singular present tense form of the German verb glühen. It means to emit light or heat as a result of high temperature, often described as a glow rather than visible flames. Glühen can occur in solid materials, such as metal or coal, when they become hot enough to radiate light in the red to orange range. The term is commonly used for incandescent states, where a steady glow is produced without sustained flames.

In technical and everyday language, glühen describes both natural and man-made processes. For example, metal can glühen after forging or tempering, and embers can glühen long after a fire has died down. The phrase the coal glüht im Feuer (the coal glows in the fire) is a typical descriptive usage. Metaphorically, glühen can be employed to convey intense energy or activity, though such uses are less common and more context dependent.

Linguistic notes: glühen originates from Old and Middle High German forms such as glūen, with the present tense showing umlaut variation. The standard conjugation is ich glühe, du glühst, er glüht, wir glühen, ihr glüht, sie glühen. The noun related to this verb is Glut, which refers to hot embers or the glowing remainder of a fire.

See also: Glut, Leuchten, Glühen in metallurgy.