This is the 4974th most frequent Japanese word.
第一声
"第一声" means "the first utterance" or "initial sound."
Here '第一声' refers to someone's initial vocal expression or utterance, often indicating the start of communication.
彼の第一声は非常に力強かった。
His first cry was very powerful.
In this sentence, '第一声' is used to denote the opening words or beginnings of an address or speech.
スピーチの第一声で彼女は聴衆を魅了した。
With the first words of her speech, she captivated the audience.
Here '第一声' indicates the introductory words or initial communication in a formal setting like a job interview.