
der Gastgeber
host
A person who has invited guests to their home and takes care of their food, drink, and well-being.
Der Gastgeber begrüßte jeden Gast persönlich an der Tür.
The host greeted each guest personally at the door.
host
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host
A person who has invited guests to their home and takes care of their food, drink, and well-being.
Der Gastgeber begrüßte jeden Gast persönlich an der Tür.
The host greeted each guest personally at the door.

host
A country, city, or organization that hosts an event such as the Olympic Games or a conference.
Deutschland war ein hervorragender Gastgeber für die Fußball-Weltmeisterschaft 2006.
Germany was an excellent host for the 2006 FIFA World Cup.

host
(Biology) An organism that carries another organism (a parasite, symbiont, or pathogen) in or on itself and provides it with habitat and food.
Der Mensch ist der einzige bekannte Gastgeber für dieses spezielle Virus.
Humans are the only known host for this particular virus.
The word is made up of 'Gast' (guest) and 'geben' (to give). A 'Gastgeber' (host) is therefore literally someone who gives something to their guests, for example food, drink, and accommodation.
Ein guter Gastgeber sorgt dafür, dass sich seine Gäste wohlfühlen.
A good host makes sure that their guests feel comfortable.
Common phrases are 'ein guter/schlechter Gastgeber sein' (to be a good/bad host), 'die Rolle des Gastgebers übernehmen' (to take on the role of host), and 'sich bei den Gastgebern bedanken' (to thank the hosts).
Wir möchten uns bei euch für den schönen Abend bedanken, ihr wart tolle Gastgeber.
We would like to thank you for the lovely evening; you were wonderful hosts.
You can recognize this meaning from the context of large, organized events. The words 'Gastgeberland' (host country) or 'Gastgeberstadt' (host city) are often used here as well.
Paris ist der Gastgeber der nächsten Olympischen Spiele.
Paris is the host of the next Olympic Games.
In the biological or medical meaning, 'Gastgeber' (host) is a technical term. You can recognize it from words such as 'Virus' (virus), 'Parasit' (parasite), 'Organismus' (organism), or 'Wirt' (host) in the same context.
Die Fledermaus gilt als möglicher Gastgeber des Virus.
The bat is considered a possible host of the virus.
sponsor / carrier
For a pathogen, Träger mainly refers to the living being that carries it and often shows no symptoms itself. Gastgeber, by contrast, emphasizes that the pathogen finds habitat and nourishment in or on this organism. Therefore, use “Träger” for an asymptomatic carrier and “Gastgeber” for the biological relationship.

Der Körper ist der Gastgeber des Erregers, der darin Lebensraum und Nahrung findet.
The body is the pathogen’s host, providing it with habitat and nourishment.
Der Mann war ein symptomloser Träger des Erregers und konnte andere Menschen anstecken.
The man was an asymptomatic carrier of the pathogen and could infect other people.