der Hund
dog
A domesticated mammal that is often kept as a pet and is known for its loyalty.
Unser Hund wartet jeden Tag an der Tür, bis wir nach Hause kommen.
Our dog waits at the door every day until we come home.

dog
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dog
A domesticated mammal that is often kept as a pet and is known for its loyalty.
Unser Hund wartet jeden Tag an der Tür, bis wir nach Hause kommen.
Our dog waits at the door every day until we come home.

The word 'Hund' (dog) is a very productive base word and forms many compound nouns. The first word often describes what has to do with the dog, for example 'Hundefutter' (dog food; food for the dog) or 'Hundeleine' (dog leash; leash for the dog).
Bitte kaufe noch eine Packung Hundefutter.
Please buy another pack of dog food.
In everyday life, 'Hund' (dog) is often combined with certain verbs. Typical phrases are 'mit dem Hund Gassi gehen' (to take the dog for a walk), 'einen Hund halten' (to keep/own a dog), or the statement 'der Hund bellt' (the dog barks).
Jeden Abend muss ich mit dem Hund Gassi gehen.
Every evening I have to take the dog for a walk.
The idiom 'da liegt der Hund begraben' (that's where the dog is buried) is a fixed expression. It is used as a complete sentence or subordinate clause to name the actual cause of a problem.
Das Auto startet nicht, weil die Batterie leer ist. Aha, da liegt also der Hund begraben!
The car won't start because the battery is dead. Aha, so that's where the real problem lies!
The idiom 'auf den Hund gekommen sein' (to have gone downhill) describes a bad state and is conjugated with the verb 'sein' (to be). It usually refers to a person's financial or health situation.
Nachdem er seine Arbeit verloren hat, ist er finanziell wirklich auf den Hund gekommen.
After he lost his job, he really went downhill financially.
The idiom 'vor die Hunde gehen' (to go to the dogs) describes a process of failure or decline and is conjugated with the verb 'gehen' (to go). It can refer to people, but also to things like companies or plans.
Ohne eine grundlegende Sanierung wird das alte Haus bald vor die Hunde gehen.
Without major renovation, the old house will soon go to the dogs.
wolf
'der Hund' and 'der Wolf' both refer to animals from the same animal family. Even so, they usually mean very different situations. A 'Hund' often lives with people and is a pet. A 'Wolf' is a wild predator and usually does not live together with humans. Learners may confuse the words because dogs and wolves can look similar and are biologically related. In everyday life, however, when talking about a pet, you almost always say 'Hund', not 'Wolf'.

Der Hund meiner Nachbarin wartet jeden Morgen vor der Haustür.
My neighbor's dog waits outside the front door every morning.
Im Naturpark haben die Besucher einen Wolf aus der Ferne gesehen.
In the nature park, the visitors saw a wolf from a distance.