improvised

(verb) perform without preparation. Synonyms: improvise, improvize, ad-lib, extemporize, extemporise. Example: "He extemporized a speech at the wedding."

(verb) manage in a makeshift way; do with whatever is at hand. Synonyms: improvise, extemporize. Example: "After the hurricane destroyed our house, we had to improvise for weeks."

(adj) done or made using whatever is available. Synonyms: jury-rigged, makeshift. Examples: "Crossed the river on improvised bridges." "The survivors used jury-rigged fishing gear." "The rock served as a makeshift hammer."