импровизирам meaning in English

extemporize [extemporized, extemporizing, extemporizes]▼(to act, particularly to perform or speak, without prior planning or thought)
verb
[UK: ɪk.ˈstem.pə.raɪz] [US: ɪk.ˈstem.pə.raɪz]

improvise [improvised, improvising, improvises]▼(to make something up as one goes on)
verb
[UK: ˈɪm.prə.vaɪz] [US: ˈɪm.prə.ˌvaɪz]

jam [jammed, jamming, jams]▼(music: to improvise as a group)
verb
[UK: dʒæm] [US: ˈdʒæm]