to take action to oppose something unfair
不公平なことに対して行動を起こす (fukōhei na koto ni taishite kōdō o okosu)
"Neighbors step up against bullying when they see it online."
"近所の人々はオンラインでいじめを見たときにステップ アップ アゲインストします。" (kinjo no hitobito wa onrain de ijime o mita toki ni **step up against** shimasu.)
to take strict action to stop or control something
to admit that what you said was wrong; to retract something
to make people more aware of an issue or cause
to prepare equipment and mindset for something exciting
to protect or guard someone carefully
to stop being overly aggressive or involved in an argument