improvised

adj. extemporized, made up on the spur of the moment, performed without advance preparation

v. ad-lib, extemporize, make up on the spur of the moment, perform without advance preparation

Improvisation is the practice of acting and reacting, of making and creating, in the moment and in response to the stimulus of one's immediate environment. This can result in the invention of new thought patterns, new practices, new structures or symbols, and/or new ways to act. This invention cycle occurs most effectively when the practitioner has a thorough intuitive or technical understanding of the necessary skills and concerns within the improvised domain.
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Adjective
1. done or made using whatever is available; "crossed the river on improvised bridges"; "the survivors used jury-rigged fishing gear"; "the rock served as a makeshift hammer"
(synonym) jury-rigged, makeshift
(similar) impermanent, temporary

Verb
1. perform without preparation; "he extemporized a speech at the wedding"
(synonym) improvize, ad-lib, extemporize, extemporise
(hypernym) perform, execute, do
(derivation) improvisation
2. manage in a makeshift way; do with whatever is at hand; "after the hurricane destroyed our house, we had to improvise for weeks"
(synonym) extemporize
(hypernym) cope, get by, make out, make do, contend, grapple, deal, manage
(derivation) improvisation, temporary expedient

(imp. & p. p.)
of Improvise
  

Synonyms and related words:
ad hoc, ad libitum, ad-lib, band-aid, caught napping, caught off balance, caught short, extemporaneous, extemporary, extempore, extemporized, haphazard, hasty, impromptu, improvisational, improvisatorial, improvise, improviso, jury-rigged, makeshift, makeshifty, off-the-cuff, offhand, precipitate, provisional, rough-and-ready, snap, stopgap, surprised, taken aback, taken by surprise, taken unawares, temporary, tentative, tripped up, unarranged, unbegun, unconcocted, uncontrived, undeliberated, undevised, unhatched, unmade, unmanufactured, unorganized, unplanned, unpremeditated, unprepared, unprimed, unready, unrehearsed, unstudied