donor / sensor
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donor
A person, organization, or country that gives something, especially money, information, or material goods.
Die Stiftung ist auf die Großzügigkeit privater Geber angewiesen.
The foundation depends on the generosity of private donors.
The noun 'Geber' (donor/sensor) is derived from the verb 'geben' (to give). The ending '-er' indicates the person or thing that carries out the action of the verb—here, someone or something that gives.
Der Spendenaufruf richtet sich an großzügige Geber.
The donation appeal is aimed at generous donors.
You can tell from the context whether a person or a technical component is meant. In social or financial contexts, such as donations or information, it means a person or organization. In technical contexts, such as a car or machine, it means a sensor.
Der wichtigste Geber für das Projekt möchte anonym bleiben.
The most important donor for the project wants to remain anonymous.
In the meaning of a person, 'Geber' (donor) is often part of compound nouns that describe more precisely what is being given. Examples include 'Geldgeber' (financial backer), 'Signalgeber' (signal provider), or 'Namensgeber' (namesake).
Ohne einen neuen Geldgeber kann die Firma nicht überleben.
Without a new financial backer, the company cannot survive.
In technology, 'Geber' (sensor) is almost always used in compounds that name the measured quantity. Typical examples are 'Druckgeber' (pressure sensor), 'Temperaturgeber' (temperature sensor), or 'Drehzahlgeber' (speed sensor).
Der Drehzahlgeber am Motor liefert falsche Werte.
The speed sensor on the engine is providing incorrect values.
dealer
'der Händler' and 'der Geber' can be very similar in a special context: in a card game, it is about the person who deals the cards. Here, 'Händler' is the person who deals the cards. 'Geber' generally describes someone who gives something; in this context, that means the cards. The words can be confused because both can fit in game situations. Outside this context, however, they are different: a 'Händler' normally sells goods, while a 'Geber' gives something, often without a sale.
Der Geber legt die Karten verdeckt auf den Tisch.
The dealer places the cards face down on the table.
Beim Kartenspiel ist heute Tom der Händler und teilt die erste Runde aus.
In the card game, Tom is the dealer today and deals the first round.