improvize

/ˈɪmprəvaɪz/
verb
  1. To create or perform something without preparation, using whatever is available.
    • The jazz musician began to improvize a beautiful melody on the piano.
    • During the power outage, we had to improvize a game using only a flashlight and our shadows.
    • When the chef ran out of tomatoes, he had to improvize a sauce with other ingredients.
  2. To make or do something using whatever is at hand, often in a clever or resourceful way.
    • Without a proper hammer, she had to improvize with a heavy rock to drive the nail.
    • He forgot his phone charger, so he had to improvize by using his laptop to charge his phone.
    • The campers used a tarp and some rope to improvize a shelter from the rain.
Antonyms
noun
  1. Something that is created or performed without preparation; an improvised act or thing.
    • The speech started as a written script but turned into an improvize when the speaker went off-topic.
    • Their dance routine was not rehearsed; it was a pure improvize that amazed everyone.
    • The comedian's best jokes were often an improvize that came from audience interaction.