annex

Etymology 1

Borrowed from French annexe, from Latin annexus. More at Etymology 2.

noun

1. An addition, an extension.
2. An appendix to a book or document.
3. An addition or extension to a building.
4. An addition to the territory of a country or state, from a neighbouring country or state, normally by military force.

Etymology 2

From Middle English annexen, anexen, from Old French annexer (“to join”), from Medieval Latin annexāre, infinitive of annexō, frequentative of Latin annectō (“bind to”), from ad (“to”) + nectō (“tie, bind”). Doublet of adnex.

verb

1. To add something to another thing, especially territory; to incorporate.
   The ancient city of Petra was annexed by Rome.
   In 1910, he returned to Korea, which had by this time been annexed by Japan. 2009, Wikipedia:Syngman Rhee
2. To attach or connect, as a consequence, condition, etc.
   Under Edward the Second, the Commons began to annex petitions to the bills by which they granted subsidies 1793, John Horne Tooke, The Constitution of England
   to annex a penalty to a prohibition, or punishment to guilt
3. (intransitive) To join; to be united.