to glow / burn
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to glow
To emit light because of intense heat, without burning or having a flame. This is typical of metals or coal at high temperatures.
Das Eisen glühte rot in der Esse des Schmieds.
The iron glowed red in the blacksmith's forge.
The verb 'glühen' (to glow) is closely related to the noun 'die Glut' (embers/glow). 'Glut' refers to the red-glowing, hot mass of something that burns without a flame, such as charcoal. This connection helps you understand the core meaning of intense, flameless heat.
Nach dem Feuer war nur noch die Glut der Kohlen zu sehen.
After the fire, only the glow of the coals could still be seen.
You can tell whether 'glühen' (to glow) is meant literally or figuratively from the subject. If we are talking about metal or coal, it is about real heat. If we are talking about body parts like cheeks or skin, it is usually a reaction to emotions, exertion, or fever.
Das Metall begann in der Hitze zu glühen.
The metal began to glow in the heat.
In the literal meaning, 'glühen' (to glow) is often combined with materials that become very hot. Typical subjects are 'das Eisen' (the iron), 'der Stahl' (the steel), 'das Metall' (the metal), or 'die Kohle' (the coal).
Die Kohlen im Grill glühen perfekt für das Fleisch.
The coals in the grill are glowing perfectly for the meat.
When it is about the body, 'glühen' (to glow) is often combined with the causes. Typical phrases are 'vor Fieber glühen' (to glow with fever), 'vor Scham glühen' (to glow with shame), or 'vor Anstrengung glühen' (to glow from exertion).
Nach dem langen Lauf glühte sein Gesicht vor Anstrengung.
After the long run, his face was glowing from exertion.
To express that someone has a great passion for something, 'glühen' (to burn) is always used with the preposition 'für' (for) and the accusative. The structure is: jemand glüht für etwas/jemanden (someone burns for something/someone).
Er glüht für den Umweltschutz und engagiert sich in vielen Projekten.
He burns for environmental protection and is involved in many projects.
to love
'lieben' and 'glühen für' can both show very strong positive feelings. 'lieben' is the normal word for deep affection for people or for a very strong preference. 'glühen für' is more figurative and sounds more intense or solemn. It describes a strong passion or devotion, often for an idea, a goal, an art form, or sometimes also for a person. In everyday language, 'lieben' is used much more often and sounds more natural. 'glühen für' fits when you want to express enthusiasm in a particularly strong and vivid way.
Sie glüht für das Theater und hilft bei jeder neuen Aufführung mit.
She burns for the theater and helps with every new production.
Der Verkäufer liebt Reisen und erzählt gern von fremden Städten.
The salesperson loves traveling and likes talking about foreign cities.