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to lay waste; to devastate; to damage
to invade; to break into
to troll (e.g. web forums); to spam
台風が畑を荒らして被害が出ました。
The typhoon devastated the fields.
泥棒が家をひどく荒らしたようだ。
It seems the burglar severely ransacked the house.
掲示板を荒らす行為は許されない。
The act of trolling the forum is not allowed.