extemporaneously

/ɪkˌstɛmpəˈreɪniəsli/
adverb
  1. In a way that is done or spoken without preparation; impromptu.
    • She answered the reporter's questions extemporaneously, without any notes.
    • He spoke extemporaneously at the ceremony, moving the audience with his heartfelt words.
    • The musician played the piece extemporaneously, creating a beautiful melody on the spot.
Antonyms
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