There's an interesting, vaguely related family of terms derived from ゲバルト, from Ger. Gewalt "violence", that all refer to 60s-era student political movements an

There's an interesting, vaguely related family of terms derived from ゲバルト, from Ger. Gewalt "violence", that all refer to 60s-era student political movements and protests. For example ゲバヘル, protective helmets students wore during protests, and even ゲバ字 "violence characters" - referring to an angular form of writing used on protest fliers and signs, meant to prevent authorities from identifying the author by their handwriting. Example of such characters: https://commons.wikimedia.org/wiki/File:NAVI_hansen_shukai.jpg https://commons.wikimedia.org/wiki/File:NAVI_hansen_shukai.j...