intertwine

/ˌɪntərˈtwaɪn/
verb
  1. To twist or wind together, so that things become connected or tangled.
    • She intertwined her fingers with his as they walked.
    • The two stories intertwine in a surprising way at the end of the novel.
    • The vines intertwined around the old fence.
  2. To connect or link closely, especially in a complex or inseparable way.
    • The history of the two countries is deeply intertwined.
    • Their lives became intertwined after years of working together.
    • Economic and political issues often intertwine.