Reaccionan

Reaccionan is the third-person plural present indicative form of the Spanish verb reaccionar, meaning they react. It is used to describe how multiple subjects respond to a stimulus, event, or action in the present tense.

Etymology and form: Reaccionar comes from reaccion- plus the infinitive suffix -ar, with the noun reacción “reaction” as a related noun. Reaccionar is a regular -ar verb, so its present tense endings follow the standard pattern: yo reacciono, tú reaccionas, él/ella/usted reacciona, nosotros reaccionamos, vosotros reaccionáis, ellos/ellas/ustedes reaccionan. The form reaccionan thus marks a plural subject in the third person.

Usage: Reaccionan can appear in statements about collective responses. Examples include: “Los sensores reaccionan ante cambios mínimos” and “Las personas reaccionan de distintas maneras ante la noticia.” The verb is also used in journalism, science, psychology, and everyday speech to describe timely or automatic responses to stimuli, actions, or events.

See also: reaccionar, reacción, reacción en cadena. As a common Spanish verb form, reaccionar and its present tense forms (including reaccionan) are typically covered within standard Spanish grammar references. In contemporary media, occasionally the surface form Reaccionan could be used as a title or proper noun, but such instances would require verification from reliable sources.