Question

annex
an·nex
I
 /əˈnɛks/  verb  , -nex·es, -nexed, -nex·ing [  + obj  ]
  : to add (an area or region) to a country, state, etc. : to take control of (a territory or place)
   The United States annexed Texas in 1845.
   The government planned to annex the islands.
  an·nex·a·tion /æˌnɛkˈseıʃən/  noun  ,  pl   -tions [  count  ,  noncount  ]
————————
an·nex
II
  (chiefly US)   ( or Brit   an·nexe) /ˈæˌnɛks/  noun  ,  pl   -nex·es [  count  ]
  1 : a building that is attached to or near a larger building and usually used as part of it
   The addition will be used as an annex to the library.
   We store our old files in the annex.
  2 chiefly Brit : a section or statement added at the end of a document : appendix
   an annexe to the document