This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
囐 is a rare character combining 口 (mouth) with 獻, but the exact historical development and original meaning are uncertain.
The left side is a mouth 口, and the right side is a complex shape 獻. Without a clear meaning, picture a mouth making an uncertain sound.
For サツ, imagine a mouth making a sharp, sudden sound like 'satsu!' — a made-up sound that fits the mouth component.