reagiert

Reagiert is the third-person singular present indicative form of the German verb reagieren. Reagieren means to respond or react to a stimulus, event, or situation. The term is used in everyday language as well as in science, covering emotional responses, behavioral adjustments, and chemical or biological interactions. For example, a person can reagieren to news, while a substance can reagieren with another chemical.

As a finite verb, reagiert appears in the present tense for er, sie, and es: Er reagiert sofort auf das Signal. The full present tense paradigm of reagieren is ich reagiere, du reagierst, er reagiert, wir reagieren, ihr reagiert, sie reagieren. The simple past is reagierte, and the perfect tense is hat reagiert. The imperfect subjunctive is reagierte, while the conditional form would be reagieren бы in other constructs.

Etymology and nuance: reagieren derives from Latin re- plus agere (to act) via Germanic development, with the sense shift toward answering or responding to a stimulus. In usage, the preposition auf is common when specifying the stimulus: auf Kritik reagieren, auf eine Frage reagieren. In chemistry and biology, reagieren describes a reaction between substances or organisms, often with a defined outcome such as the formation of products or a change in properties.

Related terms include reagieren with related compounds like Reaktion (reaction) and reagierfähig (capable of reacting). The word is widely used across domains, from everyday conversation to scientific discourse, always conveying the notion of a response to an antecedent trigger.