supplementary

 
Pronunciation: /ˌsʌplɪˈmɛnt(ə)ri/

adjective

  • completing or enhancing something: the programme offers supplementary information about the news the development of databases supplementary to existing ones

noun (plural supplementaries)

  • a supplementary person or thing.
  • British a question asked in parliament following the answer to a tabled one.

Derivatives

supplementarily

adverb

Spelling help

Remember that supplementary ends with -ary.