This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
毃 combines 高 (tall, high) and 殳 (a hand holding a weapon or tool). The exact historical development is uncertain, but it may have originally depicted striking or hitting something high.
With 高 (tall) and 殳 (a hand with a tool), imagine striking a tall object. The meaning is unclear, but the shape suggests an action involving hitting or knocking.
For カク, imagine a tall person knocking on a high door with a distinctive 'kaku' sound: kaku -> カク.