Part of Speech-Adjective

Definition-Made up or done without special preparation

Source–http://www.merriam-webster.com/dictionary/extemporaneous

Encountering of Word-We learned that being extemporaneous was an effective way of public speaking. This was said to be conversational.

Understanding-Now i understand that we were actually learning that to be effective we have to be conversational with the audience instead of reading straight off manuscripts during speeches.