This is the 14334th most frequent Russian word.
отклик
Response, feedback, or reaction.
In this sentence, "отклик" refers to a reaction or reply to a request.
Его отклик на просьбу о помощи был искренним.
His response to the request for help was sincere.
Here, "отклик" is used to describe the feedback or reaction received.
Мгновенный отклик со стороны аудитории удивил оратора.
The instant feedback from the audience surprised the speaker.
In this context, "отклик" denotes an emotional reaction to something.