This is an important bond connecting the two countries.
Tips
usage
纽 rarely appears alone — it's almost always part of a compound: 纽约 (New York), 纽带 (bond/link), 纽扣 (button), 枢纽 (hub/pivot). The core meaning is something that ties or connects.
纟 is the silk radical 糸 in left-side form. It marks 纽 as a thread-and-cord word, grouping it with 结 (knot), 绳 (rope), and 系 (tie) — buttons and toggles all began as knotted cord.
丑 supplies the reading, shifting from chǒu to niǔ along an old initial pair. The same phonetic surfaces in 扭 (twist) and 钮 (knob), all clustered around the niu/chou syllable family with senses of turning or twisting.
