Entry Word: improvise

Function: verb

Meaning: to perform, make, or do without preparation <since the award was a complete surprise, I improvised an acceptance speech>

Synonyms ad-lib, extemporize

Related Words concoct, contrive, cook (up), devise, hatch, invent, make up, think up; cobble (together or up), dash (off)

Near Antonyms arrange, prepare, ready; consider, contemplate, ponder, study, think; practice (or practise), rehearse