束ねる
たばねる · tabaneru · JLPT N1 · verb-ichidan
to tie up in a bundle
🪢 束 = bundle; ねる = twist: bind loose strands, then hold them in check
束 means bundle, so 束ねる is to tie things into a bundle. Gathering loose things into one bundle is also how you bring them under control.
束 — 木 (tree) with 口 wrapped around middle
Pictograph of a bundle: a tree or sticks (木) tied together with a band or rope (depicted by the enclosing 口 in the middle). The original sense was 'to bind' or 'a bundle,' which extended to meanings like 'to restrain,' 'to control,' and the measure word for bundled things.