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Verb: overarch  ,ow-vu(r)'aa(r)ch
  1. Form an arch over
    "Big rocks overarch the stream";
    - arch over
     
  2. Be central or dominant
    "This scene overarches the entire first act"

Derived forms: overarching, overarches, overarched

Type of: dominate, form, predominate, prevail, reign, rule