組む
くむ · kumu · JLPT N3 · verb-godan
to put together
🧩 糸 thread + 且 stack: weave threads together. Kumu ≈ come, team up!
組 on its own means a group or class, as in 2年3組. The verb covers anything locked together into one unit: crossing your arms (腕を組む), forming a team (チームを組む), or assembling a frame.