der Verehrer
admirer
A man who admires a person, usually a woman, and has a romantic interest in her.
Sie erhielt einen großen Blumenstrauß von einem heimlichen Verehrer.
She received a large bouquet of flowers from a secret admirer.

admirer
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admirer
A man who admires a person, usually a woman, and has a romantic interest in her.
Sie erhielt einen großen Blumenstrauß von einem heimlichen Verehrer.
She received a large bouquet of flowers from a secret admirer.

'Der Verehrer' (the admirer) is derived directly from the verb 'verehren' (to admire / to revere), which means 'bewundern' (to admire) or 'hoch schätzen' (to highly value). So a Verehrer is a person who admires or reveres someone or something.
Er verehrt diese Schauspielerin schon seit Jahren und ist ihr größter Verehrer.
He has admired this actress for years and is her biggest admirer.
In a romantic context, the word is often combined with adjectives like 'heimlich' (secret), 'still' (quiet), or 'hartnäckig' (persistent). The phrase 'viele Verehrer haben' (to have many admirers) is also very common.
Sie wusste lange nicht, wer ihr heimlicher Verehrer war.
For a long time, she did not know who her secret admirer was.
When the context is art, music, literature, or science, the non-romantic meaning is intended. In this case, the preposition 'von' often follows, with the name of the artist or work in the dative.
Er ist ein großer Verehrer der italienischen Oper.
He is a great admirer of Italian opera.
fan
'der Fan' and 'der Verehrer' can both mean a person who greatly admires someone. 'Fan' is very common in everyday language, especially for sports, music, series, or famous people. 'Verehrer' sounds stronger and often a bit more formal or solemn. It can also mean romantic interest, especially when a man admires a woman. For this reason, the words can be confused when it is about admiration. 'Fan' is usually neutral and general, while 'Verehrer' sounds more personal, more intense, or more romantic.

Nach dem Konzert warteten einige Verehrer vor dem Theater auf die Sängerin.
After the concert, several admirers waited for the singer in front of the theater.
Paul ist seit Jahren Fan dieses Fußballvereins.
Paul has been a fan of this football club for years.