responder

American  

[ri-spon-der] / rɪˈspɒn dər /

noun

1. a person or thing that responds.

2. Electronics. the part of a transponder that transmits the reply.

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Etymology

Origin of responder

First recorded in 1875–80; respond + -er ¹

Example Sentences

Over the past eight years, volunteer numbers have increased from about 2,000 to nearly 3,500, but Jarvis said some coastal areas still lacked enough responders.

From BBC

The student driver, identified as Jayden Ryan Wallace, 18, and two others stopped to try to help Hughes before emergency responders arrived and took him to the hospital, the sheriff's office said.

From BBC

Emergency management officials said local responders are continuing to search damaged areas and begin recovery efforts.

From BBC

Kenyan authorities advised residents to avoid flooded streets and drainage channels while emergency responders assisted stranded motorists and pedestrians.

From BBC

"I want to thank all the first responders on the ground who reacted quickly to keep Michiganders safe," she wrote in a post on X.

From Barron's