ἄνεμος καὶ ὄλεθρος ἄνθρωπος → ruinous and unstable man, a man unstable as the wind
immūtābĭlĭter: adv., v. 1. immutabilis.
immūtābĭlĭtĕr, d’une façon immuable : Dig. 45, 1, 99, 1.