exhilarate

From Latin exhilarō (“to delight, to gladden, to make merry”), from ex- (“out, away”) (from Proto-Indo-European h₁eǵʰs (“out”)) + hilarō (“to cheer, to gladden”), from hilaris (“cheerful, light-hearted, lively”), from Ancient Greek ἱλαρός (hilarós, “cheerful, merry”), from ἵλαος (hílaos, “gracious, kind, propitious”), from Proto-Indo-European selh₂- (“comfort, mercy”).