繋がる
つながる · tsunagaru · JLPT N3 · verb-godan
to be connected to
🔗 tsuna = rope (綱): things roped together are tsunagaru, connected
繋 has the thread radical 糸 at the bottom, so it is about tying. The reading is often traced to tsuna 綱, rope. つながる is the intransitive verb (things are linked), and つなぐ is the transitive one (you link them).