v .
to improvise ; speak or act spontaneously 즉흥적으로 만들다 ; 자연스럽게 말하거나 행동하다

• Teddy hadn't known that he would be asked to speak after dinner, so when he was called to the microphone, he had to _____.
• The director complained that the lazy star hadn't memorized his lines ; instead of following the script, he _____ed in nearly every scene.