protester

US /ˈproʊ.tes.tɚ/
UK /ˈproʊ.tes.tɚ/
"protester" picture
1.

抗議者, デモ参加者

a person who publicly demonstrates strong objection to something or expresses dissent, often as part of a group

:
The police arrested several protesters at the demonstration.
警察はデモで数人の抗議者を逮捕した。
She joined the group of environmental protesters.
彼女は環境抗議者のグループに加わった。