extempore
adverb or adjective
ex·tem·po·re ik-ˈstem-pə-(ˌ)rē 
: in an extemporaneous manner
speaking extempore
Synonyms
- ad hoc
- ad-lib
- down and dirty
- extemporaneous
- extemporary
- impromptu
- improvisational
- improvised
- off-the-cuff
- offhand
- offhanded
- snap
- spur-of-the-moment
- unconsidered
- unplanned
- unpremeditated
- unprepared
- unrehearsed
- unstudied
See all Synonyms & Antonyms 
Word History
Etymology
Latin ex tempore, from ex + tempore, ablative of tempus time
First Known Use
circa 1553, in the meaning defined above
extempore
adjective
as in impromptu
made or done without previous thought or preparation after the election both candidates admitted that they had made a number of extempore remarks that they later regretted Synonyms & Similar Words
Relevance
- impromptu
- improvised
- improvisational
- extemporaneous
- extemporary
- unrehearsed
- offhand
- unstudied
- unprepared
- unpremeditated
- offhanded
- off-the-cuff
- ad hoc
- spontaneous
- unconsidered
- ad-lib
- unplanned
- informal
- unauthorized
- spur-of-the-moment
- snap
- automatic
- unscripted
- down and dirty
- instinctive
- impulsive
- cursive
- involuntary
- casual
- half-baked
- half-cocked
- ill-advised
Antonyms & Near Antonyms
- prepared
- rehearsed
- premeditated
- planned
- deliberate
- considered
- premeditative
- intended
- intentional