His administration of the German Embassy was faultless in its technique, but it did not err on the side of over-enthusiasm.
Write and deliver a five-minute speech ridiculing a speaker who uses bombast, pomposity and over-enthusiasm.
And some defeated themselves by a display of over-enthusiasm that manifestly veiled indifference, or perhaps downright dislike.
c.1600, from Middle French enthousiasme (16c.) and directly from Late Latin enthusiasmus, from Greek enthousiasmos "divine inspiration," from enthousiazein "be inspired or possessed by a god, be rapt, be in ecstasy," from entheos "divinely inspired, possessed by a god," from en "in" (see en- (2)) + theos "god" (see Thea). Acquired a derogatory sense of "excessive religious emotion" (1650s) under the Puritans; generalized sense of "fervor, zeal" (the main modern sense) is first recorded 1716.