This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
綞 combines 糸 (thread) with 垂, which likely contributes the sound. The exact historical development is uncertain.
The left side is thread 糸, and the right side is 垂. Without a clear meaning, picture a thread hanging down like something dangling.
For タ, imagine a thread hanging down and tapping the ground: tap -> タ, and the thread dangles from the 垂 side.