haaren
to shed
To lose hair or fur. Used mainly for animals.
Meine Katze haart furchtbar, die ganze Couch ist voller Haare.
My cat sheds terribly; the whole couch is covered in hair.

to shed
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to shed
To lose hair or fur. Used mainly for animals.
Meine Katze haart furchtbar, die ganze Couch ist voller Haare.
My cat sheds terribly; the whole couch is covered in hair.

The verb 'haaren' (to shed) is derived directly from the noun 'das Haar' (hair). It describes the action of losing hair.
Im Frühling haaren viele Hunde besonders stark.
In spring, many dogs shed especially heavily.
This verb is used almost exclusively for animals with fur, such as dogs, cats, or horses. The animal that is losing hair is always the subject of the sentence.
Unser alter Hund haart kaum noch.
Our old dog hardly sheds anymore.
'haaren' (to shed) is often combined with adverbs that describe intensity. Common examples are 'stark haaren' (to shed heavily), 'sehr haaren' (to shed a lot), or 'kaum haaren' (to hardly shed).
Mein neuer Pullover ist schwarz, und die weiße Katze haart sehr.
My new sweater is black, and the white cat sheds a lot.
to be canceled / to fail
'haaren' and 'ausfallen' can both have to do with losing hair. 'haaren' is used mainly for animals when they lose fur, for example a dog or a cat. 'ausfallen' is used for individual hairs or teeth that come loose from the body; for people, you often say 'Meine Haare fallen aus' (My hair is falling out). Learners may confuse the words because both describe hair loss. In practice: animals 'haaren' (shed); hair 'fällt aus' (falls out).

Unser Hund haart im Frühling besonders stark.
Our dog sheds especially heavily in spring.
Nach der Krankheit sind ihr viele Haare ausgefallen.
After the illness, a lot of her hair fell out.