extemporize

US /ɪkˈstem.pə.raɪz/
UK /ɪkˈstem.pə.raɪz/
"extemporize" picture
1.

to compose, perform, or utter something without preparation; improvise

:
•
The jazz musician could extemporize a solo on the spot.
•
She had to extemporize a speech when the main speaker didn't show up.
:
improvisead-libplay it by earwing itmake it up as one goes along