This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
摋 combines 扌 (hand) with 殺 (kill). The exact historical development is uncertain, but it likely relates to a hand action associated with striking or killing.
The hand radical 扌 beside 殺 (kill) suggests a hand action related to striking or killing, but the exact meaning is unclear.
For サツ, imagine a hand striking down with a sharp 'satsu' sound, like a quick kill: satsu -> サツ.