impromptu, n.m., (—, or —s) impromptu.
impromptu, -e, adj., impromptu, extemporary, extempore, unprepared.
impropice, adj., unpropitious.
impropre, adj., improper, wrong, unfit for. Terme —; wrong expression.
improprement, adv., improperly.
impropriété, n.f., impropriety (of language); (fig.) unfitness.
improuver, v.a., to disapprove, to blame.
improvisat-eur, n.m., -rice, n.f., improvisator, extemporary speaker, extemporizer.
improvisation, n.f., improvisation, extemporaneous speaking; (mus.) voluntary.
improviser, v.a., to improvise, to produce extempore, to make extempore.