Onyomi Examples
蠢動 （シュンドウ） wriggling, squirming, writhing, maneuvering (behind the scenes; of insignificant people), manoeuvring, planning mischief
愚蠢 （グシュン） foolish, stupid, silly
Kunyomi Examples
蠢く （うごめく） to wriggle, to squirm, to crawl like a worm